Cheers folks.
Those look amazing Ouch-Kabibble- unfortunately I just know without even enquiring that they will be way out of my price range

I did manage to get 4 limes at a reasonable price actually, from eBay, so success there.
My experiments with molding were a total loss, although I'm still tempted to try the banana...! Is there still no one who would be interested in one for £5?
Regarding the olives, I think I'm going to buy some fake plastic grapes, paint them, cut a hole in and stuff in a piece of red sponge ball. I'm never going to need a whole bunch worth though so again, if anyone does jiggernaut and wants a few olives (I'll post some picks of the finished product when I get around to it), let me know.