Based on my experience, I would look in the US. Assuming you can pick up a bike for under $3K (I had mine up for $2.7 and it didn't sell) + $700K to ship if you can get it to the port ($1000K for door to door) + £400ish import duty puts you at £2900 on the road.

Caspian Blue '03 BA, Union Jack/Stars and Stripes paint, BUBs, Progressive 812s, and lots of chrome