Two/ multipiece SB timing covers?

I believe Ed Hamburger sold the piece that 67Dart273 described.. no idea if his business or that timing cover are still available.. it looked like a stock piece with the flat on top removed and a replaceable one screwed on... maybe an enterprising guy could mill part of 1 out and fasten a piece of polycarbonate over the area.. might be an idea to keep and eye on chain health too.
I hope that helps some....

Alan