The 92524 3 channel receivers are going for 45-50 dollars new on eBay. I have 3 of them now and they work great. I am guessing you have the taller 92624 that is 4 channel? No need to buy the 4 channel for an rc car application

I actually have the original 92624 that it came with still, just bigger than the 92524

the 92624 goes for about 90 on eBay.

A lot of the small shops and shops at tracks don't carry these anymore because the m11x has gone to fhss3, these are fhss2