You can still get it for 20 bucks. And even though the duratrax set is not made by os, it is still pretty good quality. I have seen the duratrax cv piston/sleeve sets last around five gallons, which is about the same as the os set. Heres a link:
http://www2.towerhobbies.com/cgi-bin...&I=LXWU86&P=ML