After seeing Johnk_10's SVT-VR with a matching SVT-410HLF I had to try it for myself.
The cloth came from fliptops. Not a perfect match but is pretty close. Can't tell there's much of a difference under stage lights.
Had to get the missus to help get it lined up on the framed and stretched into place while I stapled it. A bit of struggle but overall I'm happy with it.