Pella lock stile weatherstrip for sliding glass door

i am looking for the pella lock stile weatherstrip for the designer series sliding glass door. this seems like it would be a common replacement as it is on the edge of the moving door but i have not been able to find a replacement.

the photo below shows the bulb is 5mm x 5mm and the u shaped width is 6.5mm the length to fit the standard sliding door height.