I found a nylon strap (guitar straps work) with leather ends. In order to get it on and off the buttons easily I had to work the leather with Lexol to get it soft enough to over the buttons easily.
We're a fairly indisciplined lot Babs and no one minds too much if it's directly related.
You won't need a luthier to fit a strap button, just a decent carpenter. You can buy a 'guitar strap button' online and all it needs is a hole drilled in the end of the tailstock to fit the screw.
The bootlace should be fine at the scroll end.
p.s. see you found your way to UK & European group
I have acouple of Sue Carpenter's nylon quick release adjustable straps. Scroll to the bottom of this link: http://www.suecarpenter.net/catalog.htm . Although you can leave the straps on and just undo the quick release, there is no reason you can't just pull the loop off the ends. Since I have more dulcimers than I do straps, I put them on and take them off all the time.
Dusty T., Northern California
As a musician, you have to keep one foot back in the past and one foot forward into the future.
-- Dizzy Gillespie
updated by @sandra-hehl: 02/25/19 03:51:16AM