Can't help you directly, but if you strike out, take a close look at the motor
. It is almost certainly supplied by an OEM somewhere, and will likely be available on the internet
for a far smaller price
than RM wants.
For instance, the drive motors for RM tiller pilots are commonly available for a few dollars rather than the 80+ wanted by RM.
There was a thread here on CF a while back reflecting this situation... some searching might offer some sites to investigate, or Google