The last time I was able to buy one in a car parts store was about ten years ago. Wix still listed the filter in their catalog at a cost of about $26.00! I bought one and then they were gone. I started buying them on eBay, but the price kept escalating. You have to change the filter every 1,000 miles, so even if you don't drive the car a lot it can still add up.
Last year, I read the following ad in the Plymouth Bulletin, the magazine published by the Plymouth Owners Club:
"Oil Filter: Cast aluminum, replaces the old tin throwaway type that has a 1/8" NPT fitting at each end. 4-1/4 diameter 6" long; unscrews to replace neon filter inside;will work with any engine that filters just the bypassed oil. $165 plus shipping. Joe McGinnis, 234 Deer Foot Road, Blairsville, GA 30512, Tel: (706) 781-2805, email email@example.com"
Now, Winston sports a brand new filter with the same old appearance. What a concept!