Do any of you now if these are discontinued. 2 radio shacks ive been to say they are dicontinued and expect for some new stuff in March. Another place says they are going to get them and whenever I call they say try back again tomorrow. If they are discontinued what is the fastest motor I can get for my car. It is a zipzap but can I put other brand motors in it. Sorry if this stuff has been talked about before I checked search but didnt come up with any of this but I could have put in a bad subject line.