I have a TRX 32 and mine did the same thing , try these guys they might have one in stock.
http://www.keystonecountrystore.com/ Mine did come with an ordinary cable slide and I used that until the shock stopper came in, just put some string silencers on it and you'll be fine till the shock stopper comes in. I did find that my bow had a little more vibration without it. The guys at thr pro shop kept telling me to trash the stopper , that I wouldnt get good arrow flight yada yada yada. I toled them just give me what I asked for, I didnt come in here asking for advice. I told them I scored a 292 out of a possible 300 on a 30 target 3D course, i said hows that for arrow flight, just order the thing for me and let me be on my way. sometimes the shops really piss me off.