Ya hobby shops that dont sell redcats are d bags when you bring it in. Like i was looking for a higher voltage esc for my ezrun brushless on my volcano. I asked them if they had any higher voltage esc fans and they asked, "what car is it for", i was like oh you dont carry it, its a redcat. And they told me that nothing will fit, they only fit on specific models. But i always tell them it doesnt have to fit exactly perfectly, the esc fan just screws into the esc fins and it will work
By the way why dont you do the redcat engine replacement program and get an sh28 for 90 bucks?