Welcome to the forums thoneinventor
I've never had an R-Spec, but I've heard that they're great motors. I got my 4.2 Pro motor from
www.toyeast.com. It was only $4 for the 4.2 Pro
and normal 4.2. Shipping for me was $13 or so, but I had bought about $20 of other stuff as well. If I had only bought the motors shipping would have been $6-8.
-Micro