I am having no luck finding an old AT case with a turbo switch to house my old 486 parts.

So I was thinking I could mount my old AT board inside a new beige InWin A500 ATX midi tower case I bought recently. It has screw mounts for the older AT mainboard. I could also use a AT to ATX IO plate and a power plug converter for the PSU. Then I am only missing a turbo button to reduce the speed for the oldest games.

I am sure I saw some kind of switch on an blanking plate while browsing online in the past. I think this would do the job or could be adapted to do it. The only problem is I cant find it online anymore. Maybe I am misremembering and there was never such a thing.

Anyone else know where I might find such a thing?

Thanks