compliments of the internet haha, may help your search for alternatives.
ARC Pipe swaybars Front and rear (need translation but they are top quality like Largus sways)
http://www.autorefine.co.jp/
Largus - Front bar 31.5mm, 27.5mm in the rear. 3 way adjustable front only. Tubular steel construction. Stock type endlinks. Largus includes new bushings with purchase. ^Will not clear SR20DET oversize oil pans (eg; greddy oil pan, not sure about ARC's). It will also not clear the Yashio Factory Tension Rod braces...
Whiteline - Front bar 27mm, 22mm in the rear. Solid steel construction and 3 way adjustable. Whiteline users their own specific blade type endlinks (14 lbs)
Tanabe - Front bar 30.4mm, 27.5mm in the rear. Tubular chromoly construction. Stock type endlinks. (7-1/2 lbs)
Godspeed - Front bar 30.32mm, 28.16mm in the rear. Tubular chromoly construction. Stock type endlinks. Note this bar uses CRUSH bends instead of mandrel on higher quality bars.
Progress - Front bar 30mm, 24mm in the rear. 3 way Adjustable front & back. Solid steel construction. Progress supplies a heims type endlink on these swaybars.
Cusco - Front bar 30mm, 27.5mm in the rear.
Nismo - Front bar 30mm, 23mm in the rear
Suspension techniques - Front bar 28.6mm, 20.64mm in the rear. Solid steel construction. Stock type endlinks
Intrax - Front bar 29mm, rear bar 22mm. Comes with greaseable bushings/brakets. Stock type endlinks. Adjustable.
Addco - Front bar 28.6mm, rear bar 22.2mm.
Megan - Front bar 28mm, rear bar 22mm (Solid Type)
[edit] Notes to be considered when selecting a swaybar upgrade
-Stock swaybars are hollow as well as several aftermarket replacements. Testing has found the tube is the strongest shape and while maintaining a proportionate wall thickness a tubular swaybar will provide only 5% less stiffness for one made out of solid metal in the same diameter but will have a significantly lower weight, sometimes a reduction as much as 10-20lbs. This has no heavy polar impact since its so low on the chassis but will impact braking/acceleration respectively.
-Adjustability is something to weigh in consider if thats a concern for you.
-Stock endlinks are actually very well designed but due to the age of the cars tend to have rotted bushings. Replace them with eurathane bushings from energy suspension kits, or the universal swaybar bushing kit available at local auto parts store. Note when using the universal kit the bushings must be sliced in half using a razor blade as they are twice as thick as what is needed.
- Whiteline swaybar blade type endlinks are not as well designed as the OEM supplied endlinks so that does impact the functionality vs stock links with eurathane bushings or aftermarket replacements. If using whiteline swaybars it is recommended that aftermarket replacements are taken into consideration
-Largus, Splparts.com and PDM Racing both produce a heim joint based replacement endlink solution for both stock and whiteline type bars. This will improve the performance of a swaybar by removing give/squish with bushings.
-Take into consideration front clearance when choosing large swaybars like the Largus ones, if memory recalls 28mm+ will not clear yashio factory and driftworks tension rod braces (
http://www.rhdjapan.com and
http://www.driftworks.com for purchase) and the Largus front sways specifically will not clear oversized oil pans (eg; greddy) for the sr20det