I owe a huge thank you to
@joglo for agreeing to part with this.
Here's the frame, plus stem and bars:
I have a few ideas for components, hopefully using some of the many I have that I haven't used.
First, though, is to find a fork. I think I have got rid of all the spare forks I had so I'm on the hunt for something suitable. Usually, I am a bit fan of rigid bikes, but given how rigid these frames are meant to be it might be an opportune time for a little bounce. What I would really like is a Paioli HPS fork:
https://www.retrobike.co.uk/threads/paioli-hps-fork.464602/#post-3437920
However, given that's going to be difficult, I also have a couple of other considerations. These came with Concept branded Amp Research forks, I believe. I would certainly consider an Amp fork, but rather than the black-legged Concept one, I would prefer a champagne/bronze or grey F3 fork.
I will also keep an eye out for a suitable rigid fork, since there's a change that I don't get on with the front suspension and later change to rigid anyway.