I'm finishing assembling my modest darkroom. Initially I thought I would go the LED route, but decided to go with old school filters. I already bought some NOS 8X10 filters, but don't have a safelight to go with them.
I intend to use the safelight on a table, so a bracket is a plus. Also an OC filter with it would be nice, I only managed to find the #1 and #13 filters.
If anyone is being put off by my location, I use a freight forwarder operating off Nevada, shipping anything to me is the same as for anyone else living on the USA.
One of the red filters has a crack in it, but it works. Much bigger than i need. I got it when i bought an enlarger.
Sorry if this is not even close to what you want.
You can make a filter with two pieces of glass, a piece of diffusion material from Rosco and a sheet of the Rosco "Flame" red-orange filter material. make a "sandwich" and then bind the edges with aluminum HVAC tape.