I think I saw these in Salloways Jewellers in Lichfield.
They also did rather lovely earing, long and dangly by the same designer. Sorry I can`nt remember the designers name.
You should be able to find them in the phone book. I`m certain as they are a very reputable jeweller (family Business over 2/3 generations. They should be able to come up with some surgestions. Do you live in the midlands?
If so you could have a drive out and have a look. Best of Look. I hope this is helpful.