I'd be interested in a pair or two of rockers. Let me know the price per pair.
Also I have a 2 x J13s; one totally complete with exhaust, intake, carb, flywheel and pressure plate, and one not so complete in containers with a turned crank, cam, new rebuilt head, two sets of rod bearings, and a new set of .020 (I think) pistons with connecting rods. Let me know if I can help.
Here a link to compatible engine parts. Yeah, most info is British, but the E1 and J13 are copies of the BMC A motor found in your Austins, Midgets, Sprites, Morris Minors, etc. E1 at 1189cc is compatible to the 1098cc and the J13 to the 1275cc found in your later MK-IV Sprites and MK-III Midgets. Nissan turned it up to 11 and made their engine just a little bigger.
http://www.farm.net/~mason/datsun/datsun-parts.html
No idea how I came across this link.
I'm in Leavenworth, KS and Victoria British is only 30minutes away down in Lenexa, KS. So if you decide to go this route I can check on size, fitment and send pics and spec back to you. I usually go down once a month via KS 5 to 435S in Godzilla, so my son and I will definitely enjoy the ride.
v/r
Andy