I know of nothing that will cope with a 62T spur without some work. The CR is a buggy mount and hence is looking for a 44-48T spur - The CRT is more suitable a designed for a larger spur but again the CRT as you point out has the chassis cut out.
The key thing is do the wholes line up - It is pretty easy to change the spur to something smaller and adjust the gearing accordingly.
Failing that it might be easier to use something that uses the nitro motor mounting holes.
http://www.impaktrc.com/product_info...oducts_id=4256
