Catted Y for Pacesetter LT's???
 

Is there one other than TSP? Where can I get a catted y for these guys? Does anyone have a used one for sale?

The TSP is ultimately the best option to go with. I don't really see a reason why you would go with another one, unless the price is ugly. But, dont expect to get a decent y pipe with high flowing cats to be cheap.

For a used one, check the parts for sale forum.