http://www.ehobbies.com/ttr9060.html
http://acehobby.com/ace/TTR9060.htm
http://www3.towerhobbies.com/cgi-bin...&I=LXPUE1&P=ML
well xjet doesnt look like 85 bucks is going to be what you pay for the next one. i went to look for one and tower shows yours is discontinued. the one that replaced it is 125
old
http://www3.towerhobbies.com/cgi-bin...?&I=LXKF93&P=0
new
http://www3.towerhobbies.com/cgi-bin...?&I=LXKF99&P=0
hopefully your lhs has some still in stock looks like a superb engine. I had always heard bad things about those engines but i have noticed most of the people who used to say that probably haven't ever actually flown with one either. yours makes for a cooler story you should send the photos to them as a testament to the abuse they will take lol.
I think Tower is more interested in selling OS LA's for $110.00. Nothing I see suggests the GP is out of production. The Pro series is not a replacement for the GP series. They exist in parallel like the AX and LA series does in the OS line.
Bill