What I'm seeing is if this were curtain track, it would need to be cut from a larger piece. I'm not finding any track splicers that match, or that include a stop.
Most of the miter track has an extra recess in the bottom, I even looked up Boat convertible tops and that track is 7/8" wide, way too big.
This box seems to be precision cut, like a single machined piece that comes that way - and I'm at a loss after hours of searching different areas
I'm also at a loss with the button, it seems to be a non-standard size, and that seems to rule out hardware almost all together. I don't know vintage audio equipment, but I'm stumped. Any other ideas?
Also, Would anyone with machining capability be willing to make a kit of both the box, rectangular stop and button/spacer? T slot cutter and some drilling and lathing...cant be too much aluminum or steel stock at least, but im not sure if theres enough interest.