I finally found a source for these filters, in Canada at least:

Acklands has them as follows:

B114 oil filter for diesel $7.12
B243 oil filter for W/B $6.98

Prices are in CDN $, and they offer a discount if you have a
charge account. I'm planning to open a charge account first,
then order some, so I'll let you know how they compare with the
Bosch & VW OEM I'm using now.

I believe Baldwin are the OEM for Amsoil filters, which along
with PureOne and Mobil1 are supposed to be the best
available, but Baldwin is the only one with a size to fit the VW
diesel.========================
Shawn Wright
Computer Systems Manager
Shawnigan Lake School
http://www.sls.bc.ca
swright@sls.bc.ca