SFP #9340 rear main seal for SBM

I'm rebuiding my 340 and after rear main seal issues, i prefer to install the SFP 9340, many guys are very satisfied with this product in France too . At this time it's not available with the distributors like Mancini or Hughes, it's backordered.
I found many performance seals for Chevy, Ford and Mpoar big blocks, but for SBM it's very difficult.
If someone has a spare SFP#9340 seal and be ok to sell it, i will be great
Or if i can have an advice for another Perfomance Silicon seal, i'll be interested
Many Thanks Capture d’écran 2024-08-08 à 08.42.35.pngimage002.png