I know Koni stopped making the rears, but am wondering what else may fit. I ran E39 shocks on the back of my old WRX before Koni came out with a set. Has anyone figured out what fits with the proper adapters?

I just bought a Celica that I'm getting ready to put a news transmission in and would like to tackle the suspension next. I've got Koni inserts for the front and would like to find something that works for the rear.

I see that TC rear shocks fit, but are short. Not sure this works since I want to run street class in autocross.