Try ringing Tiger Helicopters at Shobdon (ask to speak to Alan or Lee, Boss/CFI respectively). They're really very friendly and helpful, and it's cheap. Also, they have very (!) cheap accommodation available on site, which might make the difference if you need to stay somewhere for the duration of the course.
I needed to do a B206 type rating and CPL(H) skills test earlier this year after leaving the military, and they were really good. I think they're offering a free trial lesson on an R22 at the moment (details on their website) - you may be able to negotiate that into your CPL(H) course if you ask nicely...
PM me if you want details or have further queries.
SBW