I have just had some hurdy-gurdy straps made by a chap in Ludlow, Shropshire, UK, and thought that it was worth sharing with the forum, in case anyone else is interested in having any made.
They are made by Ray Hatley of Barefoot Leather, whose website address is http://www.barefootleather.co.uk
Some pictures included below.
These have been made with a single hole at each end, as I was present when they were made and they have therefore been made to fit me. He will also do straps with the three holes. In fact, he is a very amenable chap, and will do anything you require.