Some time ago I decided to design my own version uf the Milestag UMT board but using components easily sourced in the UK.
I used KiKad to re-engineer the UMT schematic:
And designed a PCB using surface mount components. The PIC micro is through hole so it can be taken out for re-programming. I could have put a programming header on the board but I decided not to as it would have made the board bigger:
I've sent the gerber files to Itead Studio for manufacturing. They charge only $28 + $5 delivery for 10 boards which must be the cheapest service on the planet.
I have no idea what quality they will be, but for a $32 punt it's got to be worth a try.
A pre-built version of this board is now available at Tagbits