For a lighter musical instrument like a violin or a small acoustic guitar a stainless steel glass holder and some part of a hard disk to hold the bow will do.
What you need:
- 2 stainless steel glass holder (12x40mm or longer depends on the violin)
- old gasket from a faucet (optional)
- some shinny piece of rod or rail guide (optional) or small screw to hold the bow
- screw driver and pencil
Please see the photos for putting everything together.
Hope this helps.