Oil filter folks:           

Ok, I have read the wet westies page on how someone has rated several oil filters, now what ?

Many of you have suggested Mann and or Mahle oil filters.
My question to you is why those filters, they are not mentioned on the wet westies page ?  Where would one purchase these filters if one wanted to purchase them and where could one get information on 
these same filters.................?
If these filters are superior to others why have they not as of  yet been put on the oil filter page ?

clarence.
1990 westy multi.