James Dove Meadows in Newton Abbot has it - I live close by and could pick it up.
If it is just a small repair I have a can - and you are welcome to use it (I also have white, black and navy blue pigments). I could bring it down the club on Saturday.
You should be aware that clear gelcoat has a pinky tint - it is really meant to be used with pigment. If you want a high gloss really transparent repair then polyester resign might be better.
Also it is "unwaxed" so you need to cover the repair to get it to set.
Thanks for your reply Mark. I was advised by RS to use clear gelcoat with white pigment on the bottom of the board, and without pigment to replace a small section of the black carbon trailing edge, where I suppose the slight pink tinge isn't obvious.
I was in Cornwall all of last week, so picked up some white gelcoat repair in the chandlery in Penryn whilst I was there. I'll give it a go with the gelcoat repair and will see how that holds, if not I may well take you up on your kind offer of a bit from your tin!