talkmagic.co.uk

Does anyone know if there is a place where I could send Taiwan Coins to get machined to the folding version?

And if so,what is the approximate cost ?

Drop Eddie Gibson an email. http://www.eddiegibsonmagic.com/ as he almost definitely could do it. As for price, you would have to ask him.

If you want to compare what's available, you could also check out:

Todd Lassen: http://www.toddlassen.com/
Roy Kueppers: http://www.roykueppers.com/
Jamie Schoolcraft: http://www.schoolcraftprecisionmagic.com/

All of these guys do custom work. Todd Lassen and Jamie Schoolcraft generally get very good reviews. I have a Roy Kueppers shell, and it's fine.