Thanks, I'll try the local Nissan dealership first and see what they say. I tried to get some Nissan motorsports A-series engine parts from them once and they said are not available anymore.
I sometimes wonder how hard the parts guys try.

I've got a good book 'How to modify your Nissan & Datsun OHC Engine' which I bought for my Z and 510 engines which has all the Nissan Motorsports part nos. for L-series engine parts. The
book was only printed in 2000 so you'd think the parts must be available, in the US at least. Perhaps it's better to just give them a part no. which they can put in their computer, thereby
bypassing the mental problem some parts guys have with 'old cars'.

Could you post the Nismo part no for the Konis?

Cheers,
Morgan