I looked on their site and found what I needed. Price is as stated above. Shipping was $6 or so for the filter. Thought I could save a few $$ by getting 4 at a time.....wrong. Total for 4 filters would have be close to $88. Dealer near me has a couple on the shelf for $26 each. I'll get them locally for $4 difference.

Purolator has a battery filter listed on their site - C25571.

Advance Auto carries Purolator stuff so I may check them this afternoon since they just bought up a local chain of parts stores and are finally in the Boston area. They are a little better than AutoZone who now seems to be all about dress-up parts. Very few name brand filters anymore - just some Chinese made line available "exlusively" at A.Z. Big deal.