Stuart,
Sorry I missed that!
And I can't help much as I really only go to the Ross jumbles, and that's mostly to socialize & meet up with friends.
Locally a lot of parts go thru' HJ Pugh's auctions and despite the negative opinions some people have about that way of buying I do know bargains can be had & it is a good alternative when all other options fail. Next auction is 16th May and catalogue is usually online a week before. Obviously you have to factor in their fees & delivery. If you see a specific lot let me know & I can go to check condition for you before the sale.