where to find camper shell window seal material ?

hey guys have a snug top camper shell on my 2003 extra cab tacoma with 6 ft bed .
the camper has done its job but the rubber seals around the 2 sliding side windows and the real window have started to crack .
i have been to couple different stores in the area and can

 

Some of those get really specific to the brand of topper. I looked for a long time to find ones for the windoors on mine but I just ultimately used these that slide on the edge and they work just fine. https://amzn.to/47lBlwH

 

i bought my topper used, and the guy replaced the whole my side sliding window/frame. he used a foam weatherstripping door seal-type that comes in a roll. peeled the adhesive-backing off, and stuck it to the frame, with the gap (start and end) meeting in the bottom side, then mounted the assembly.