As above I need some original pressure relief springs and pistons, nobody seems to sell these now!

I fitted new ones a few years ago, think it was either GSF or Machine 7 I got them from

A Google search found these on VWHeritage
https://www.vwheritage.com/shop/beetle/1200-1600cc-engine/oil-system-pumps-sumps-pressure-relief-dipsticks/?startRow=87&startPage=4#

If you have trouble finding something then give these Guy's a call, they
are in Edenbridge and know what they are doing, maybe send
a them a spring sample and see what they can make.

https://www.capitalsprings.com/

I made my own plungers, copied the originals, and extended them a bit to jump over the 'ledge'
that can form/happen on older engines, I could try to do some for you.

I hope you sort it out though

Peter

Found some springs thanks. It's just finding those plungers now. Peter I'll let you know if I have no luck. Thanks for the offer!