Re: BT seals
These are the characteristics of the seals I ordered from SSP in 2019. It looks like they have increased a little bit the price but not much.
I am sure you can find a manufacturar in europe or Asia that would make something similar.
You can go to their website and find out more about the materials they use.
10 pcs. Silicone wiper 59.5 x 80 x 4/12 =$ 31.65ea.
20 pcs. ditto =$ 29.75ea.
10 pcs. Silicone u-cup 59.5 x 80 x 12 = $ 32.50ea.
20 pcs. ditto = $ 30 75ea.
Will need 14-17 business days to ship.
SSP Manufacturing Inc.
83 Spring Lane
Hackettstown, NJ 07840