it's actually for an "L". The leather is a bit "gooey", so I think I might need to make or buy a replacement. But any tips on cleaing it out (i'm thinking isi alchohol or white spirit) welcome - but I'm worried that it'll just crumble.

I'm looking for a piccy of the business end of the piston, showing the mounting, profile, etc. I'm not sure mine is an original mounting. I might just stick an o-ring nose in there, or a Diana 28mm parachute seal, and sleeve the TP down. But I'd like an original option too before you all try to burn me at the stake...

Thanks in advance,
JB