Hey and welcome to NICO Club!
Get car, get floor mat, drive it like it's hot!
I don't have a vert, but the S13 still has some carpets out there. I don't think the floor of the vert varies from a coupe or hatch. Can you use something like below? Even if not perfect, maybe a great starting point for a modded carpet. Shoot! after a second glance I see it actually says on the site that it will NOT fit a vert! Damn. I still wonder if it's not a near match and useful for a modification. More searching...
http://www.stockinteriors.com/AutoCarpe ... fgod6Q8Buw
Search results! It has been discussed and the idea of using a coupe/ hatch carpet is tried. Some photo links are broken because it's an old thread, but some are still visible. Check it out! There could be more info, but my lunch break is over. Let us know how it goes. Oh, and get the car!
convertible-carpet-help-t271600.html