Hek, I missed out on these:

source: https://hackaday.io/project/165498-classic-radioshack-protoboards

Unfortunately as mentioned before:

https://wb9kzy.blogspot.com/2022/05/another-one-bit-dust-year-ago.html

BG Micro is out of business.  But the hackaday poster did also include design files so it might be possible to get some made, we'll see.

I'm down to one of these:

Incidentally I remember reading that Global Specialties was originally called Continental Specialties but that the company name was changed because the phrase "continental specialties" means something a lot different to the English than electronics parts and equipment :)

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm