[Rubbond]

Hello,
I don't know if I can be of help here or not, but I do have experience in
the automotive rubber business since 1983 and have some knowledge relating
to door and window seal profiles, etc..
There are litterally thousands of different profiles, from cloth covered in
the 1950's, to moulded sponge rubber profiles as used on the best cars like
Mercedes in the 60's, to the clip-on type extruded bulb door seals which
would later be able to fit the more consistant apertures of mass produced
cars in the 1980's and later.
Being hand built, Bristol cars would probably have had to buy off the shelf
profiles I would imagine, and these may no longer be available.
Check however also that the door hinges have not dropped - this no doubt
would result in very poor sealing and a lot of wind noise!
With best regards,
Andrew.