I've had a reply from Peter.
"We have 2 types of self adhesive badge stickers - one for outside at £0.75 plus SAE or new ones for
sticking to inside (i.e windows ) at £1.75 plus SAE
Both are about 70mm in diameter with the club badge
We have in stock Lapel badges Old Style Engine Badge at £2.50 plus SAE
Standard round lapel badge £1.50 Plus SAE
Special Centenary Lapel badge £2.00 plus SAE
If you want a car badge (very limited stock now) it's still £29.50 plus £3.50 P&P
If you have an old copy of Triple magazine (2017) you can find the details on the last page.
Stickers will just go in a 2nd class envelope - not sure about lapel badges perhaps a Large size envelope with SAE because
of the thickness size for mail these days. "
Email Peter at the email address of Paul's last email and he'll let you have his address for posting the Stamped Addressed Envelope. Happy Days!
However, as Ian and Peter have said, he is busy with the Exeter at the moment.