Hi,
I have some seed from a purple/black cherry tomato. Don't know the name as I collected the seed from some tomatoes I was given last year. The fruit are about 1" / 25mm dia. and quite sweet.
If you want a few seeds pm your address and I will post them to you, there should still be time to get them started.
If you have any red cabbage seeds I would be glad of a few, I was promised some but they never arrived.
Regards Grandadg.