weatherstrip for weathershield

I have Weathershield doublehung windows that are about 30 years old. The windows are still in great condition, but the weatherstrip, particularly on the bottom of the lower sash, needs replacing. It has a very thin kerf piece, do you carry something that will work?

Have come across the same situation on a home in my area. have just started looking for replacement seals for the bottom sashs on a job. Thanks.