[waterfilters]

Our PUR reference does not include this old style pitcher.

You could try the universal Culligan P-1RU filter. I've included the dimensions below so you can decide if you think they would work.
http://www.waterfilters.net/Culligan-P-1RU-Replacement-Filter_p_0-197.html

The top diameter is 2 1/2 ", bottom diameter is 1 7/8", and it is about 4
3/8" long.

If you do not think the P-1RU filter will work, you could try a new Culligan OP-1 pitcher. They are not too expensive, and then we will have replacement filters available.
http://www.waterfilters.net/Culligan-OP-1-Water-Filter-Pitcher_p_0-188.html