Oh for the joys of incorrect parts books published on line and elsewhere!
The drophead seals are handed and the correct parts are WKC4101 for the left hand door and WKC4102 for the right hand. WKC4101 went out of stock years and years ago and I suspect that the large quantity of WKC4102 meant that they were sold as being the same for both sides - which is only true for the fixed head cars.
Some parts suppliers use the 02 part for both, others the 01 for both - but the best you will obtain is a reproduction that will sort of fit as it cannot have the extra material on the original unless it is handed and sold separately.
I did have a NOS WKC 4102 and fitted one recently to my car - but that failed its MOT on brakes so I cannot take a picture for a few days.
Sadly that does not help with where to obtain them - but if I can break even on alloy wheel centres I might make this my next project!
Brian