Bottom line: I left empty-handed. They have a plethora of hard cheeses, but not much in the way of triple-creams. Lots of brie, but those are boring.
Last night I popped a jar of the home-made pickles into the fridge which had been made from pickle cucumbers (the ones I had brought to BASFA were made from Japanese cucumbers, which are small but slender). Finished the whole jar today (okay, there were only 3 of them) and they were much crunchier. And not quite as overpowering. Pretty much what I'd had in mind when I made them.