Is it vellium like what is used as a diffuser in Marantz receivers? If so you can substitute parchment paper available at your local grocer or bakery supply store.
My amps have it. I was thnking of "refreshing" it. I found some vellum paper today that looked like it might work. I have another place I will look tomorrow which should carry both vellum and parchment.
Just fine. They had me confused the other day. The meter range switch setting is different on them. On one, the 0db setting is on the right, the other the left. The stencilling confirms this. On Larry's the 0db is on the right, with -20db on the left. On the 2nd one it's yjr opposite. I thought I had gotten into some extra strong craft brewery ale.