Try all the Junkyards down on South Congress near Slaughter Ln(south Austin). If they don't have a decent motor, go to South Austin machine shop(if still open) and hit them up. Can also look on Craigslist. I saw two adds for GTP part outs about a week ago, one of them was a black GTP in Austin. There is hope for your GTP, just have to know where to look. Also try Budget Wrench Apart in Del Valle near ABIAP.