Try some nail varnish remover in a test area. I had a Stumpy that had been repainted and did part of that to reveal the original decals. Do it somewhere well ventilated and if I remember the key to the nail varnish remover was one with acetone. That said that may all contain acetone. I put some...
Something like this I would have thought ?. Although this might not necessary be the right size.
https://www.sjscycles.co.uk/seat-posts/vintage-style-steel-seat-post-binder-bolt-16mm/
Personally I would try and resurrect those Pace forks. A few places have replacement elastomers and they are easy enough forks to service yourself.
Edit - Mind you has someone taken the brace off from the rear of the fork ?. If so do you have it ?.
Lots more to come but here is a start of the parts I will never use. Some are also on ebay but listed cheaper here. Prices exclude postage and I will post at cost via the courier of your choice. Happy to take paypal f&f or if you cover the fees goods and services. Can also do bank transfer...