Door end cap seals?

Personally, I would much rather have good used seals over the reproductions and I have been selling and reproducing weatherstripping for over 28 years. Most of the U-Jamb seals do not have the insert and many are too thick requiring them to be ground down a bit to work properly. If the door end cap or U-Jamb is separating from the insert, you can glue back in place and then place a bit of Plastic Dip over the repair. For door seals that are not torn or severely distorted, just replace the clips which can be purchased cheaply.
As a stocking distributor for all of the various weatherstripping manufactures, you can shop around and find a wide range of pricing. Steele will be approximately twice the price of the average retail from the other vendors. The Steele pieces will be the best fitting and will be the closest to OEM.
If you should want any pricing, just drop me a message.