Rear stabilizer bar

[Turbo Haraune2]

I want to get a thicker/stiffer rear stab bar for my racer. Im currently running a 19mm from CSP but it is not enough for my driving style.

Currently im trying to get the racing bar from aircooled.net but it has been on backorder for 4 months now. and they dont know when they get it in again.
Anybody want to sell me a used item?

Time is running out on me to get all parts in place for next season, so what are my options??

Is there any stabilizers from other cars that can be used with modifications?
What have been tryed with succsess??

I can fabricate almost anything by myself of what is needed of brackets and fastenings but i need something to work from...

Any help on this issue is highly appriciated!