Those are pretty expensive. You can go to any NAPA store and they will have, or can order, a spin on oil filter base. While you're at it, why not lose the stock fuel filter and get a spin-on fuel filter/water separator for a VW Jetta. About 35 dollars for the filter bases, and 10-15 for the fuel filter/water separator for the VW diesel jetta. Oil filter is cheap, too.
NAPA's website has some information but last time I checked you couldn't order on line. I think they don't want to compete with their bricks and mortar business. Sort of a passive-agressive thing.
Quinn