The dimensions on mine are bad. So i'm not sure what is a new good one should be like but this is a starting point i guess. There're 2 in total, a flanged one located in the cap, and a cylindrical one Flanged dimensions -- this one was in slightly better condition OD 11.49mm ID 8.28mm << this is WOR...

sure I think I still have the old loose bushing laying around I'll try and take some measurements.

just posting an update, at the end I went with original design and got oilite bushes installed back in by an engineering shop as I couldn't wait. You should be able to order some from here https://www.bowman.co.uk/bearings/oilite-bearings-self-lubricating-bearings/plain-bearings you'd need one flang...

have your bearing arrived? I am thinking about doing the same...