Old age is the likely reason for its demise.
My mechanic hasn’t mentioned another suitable replacement part and he would know. The £93 one is probably the best option. Fitting etc will be around £100 including regas- the air con place will fit it not the mechanic.
Ok so is the £93 going to be in a similar condition.
I'd see what other VAG cars the pump fits and try and find one with the newest possible. Then again £100 for fitting and regas and re oil is a good price compared to just a regas.
Any idea what caused the failure? Is it a common thing and the replacement will be the same?
Any other of the VAG group share the pump?