Knackered plenum

[Dungman]

Doing a few bits and bobs on the Chim today and decided to clean the throttle butterfly. Removed the afm to throttle elbow to find this





The metal does seem very thin. Can't think of any way to repair this so new plenum it is. I assume the gubbed one is standard? the id of the intake is 72mm and this





is stamped inside. Also has this





on the underside for some reason. There is no connection from inside this part to inside the plenum so mystified why it's there.

Don't suppose anyone has a spare plenum they would like to sell?!