"Quality" of repop tail light seals - or: lack of it!

This weekend, during a good clean-up session I noticed the perished and fractured tail light seals:

Unfortunately, there is only 1 supplier for these reproductions,and it is basically a fraud to charge 16 Euro for a pair of seals which is wasted after ~30 days of sunlight and UV radiation!
I found 1 NOS seal in my parts stash - about 40 years old! Which is far better, I hope to find another NOS part.