My 95 has the intermittant lifter tap as well. The last time I changed oil I added 1litre of Lucas Oil stabiliser. It is stringy like honey thinking this might help with the leakdown ... it didnt.
It only happens when it's cold then gradually goes away. I'm not going to deal with it now.
I had this same problem on an older VW.
I have an older Datsun and there are a couple of favorite sites that have good pricing online ; rockauto.com, mrautoparts.com
Good luck