Rocker Cover Query

Ive a 92' Golf GTI Sportline, I had an oil leak, so i jet washed the engine, found it came from the rocker cover, i replaced the rocker cover gasket with the rubber one from VW heritage and hey presto the oil leak was solved! this was 2 months ago and it now the leak has come back! I've tightened the rocker cover but still no joy.  does anyone think i should actually change the rocker cover now?  and where would i get one from please?

regards

did you change the studs for ones without a shoulder as part of the conversion?

the tin covers can warp, sometimes some careful bashing on a flat surface can straighten but its fiddly as you need to do this on the inner mounting face and the outer lip can get in the way.

Yes changed the studs, just ordered a replacement rocker cover from crazy quiffs to see if this works

cheers