MatthewG-H,
What I would do if I were in your shoes, is go to the USA and do an FAA CPL(H), which I imagine you would p*ss through. Once you have this, train for the CPL(A) which will be training as required by virtue of your CPL(H). Once you have this add an FAA IR, depending on your level of Instrument experience (high I should imagine) this could take anywhere from 15-40 hrs. Train for and take the CPL(A) ME (IR). Now you're ready to convert to JAR.
if you need any more details, feel free to drop me a PM....
Cheers
EA