I think I got John Grey from a seller on Ebay Ladygardener a couple of years ago. I have a little violet plant in a small pot which I will send to you with the bulbs. They get bigger by sending out runners so are easy to keep small if you want. I was reading an article on a violet farm in Dorset or Devon and there are Parma Violet plants - they have to be kept warmer and dryer than ordinary violets.
The Parma Violets would'nt do too well here with all the rain we get Jasmine