In reply to GrahamUney:
I only have a few but I really liked them. I know some people claimed they were more difficult to remove but I never really found that a problem myself. I am surprised the design hasn't been relaunched although perhaps they would be too expensive being a more complex shape.
If you are interested in 2nd hand I think I have 4 left which don't get used any more. Condition would vary from good used to unused. I am not sure on the sizes without checking but would guess 2,4,6,7. If you are interested in possibly buying them I will dig them out and check them and get pics.