Hi Garry,
RC-Monster are based in the states but everything ive ordered from them for my brushless X1CR has arrived within 3 days, even a custom battery tray i spec'd ! Ive only googled it but i believe this is the part you need
http://www.rc-monsters.com/proddetai...=rcmhypermount
The rcproductdesigns kits are better quality but the lead time is months and months and its more expensive..
From memory i think you can fit a smaller pinion using the rcpd kit, the slots in the rcm one only only down to 13t (i think) tbh though i cant see you needing to gear down below 12 at all... 14t pretty much suits..