1928 Essex Brown Bi-Lite

You can make up retainers quite easily using some springy stainless steel cut into small squares or rectangle, bent down at each end, and with a hole in the middle for the bolt to pass through. I prefer to use stainless nut and bolt (3/16" from memory). You need to be careful not to put too much pressure on the glass to retain it only and not chip or break it (as I have done in the past) hence flexible stainless as an example that can put firm pressure to hold but not damage the glass.

Hope that helps

Alistair