Does anybody make an aftermarket trans crossmember that will work for a TH350 / Powerglide with a BBC in a 69 Camaro???

Thanks

An OE "4-speed" big block crossmember will work, as should the repro versions of same.

http://www.rickscamaros.com/product.asp?pf%5Fid=CM%2D2&dept%5Fid=3524

Small block and L6 crossmembers were all the same, but because BBC automatic applications used the TH400 which needed the tubular crossmember, the "normal" looking offset crossmember for BBC was called the 4-speed crossmember. Because the TH350 and Glide have the trans mount in the same place as the 4-speeds, you can use this same crossmember behind a BBC with either auto.

Check this thread for definitive pics:

http://www.camaros.net/forums/showthread.php?t=160936