I bought 2 grape vines to put inside my greenhouse last spring,i got them from victoriana nursery,they are Black Hamburgh and Triumph D`Alsace,they didn't fruit in the 1st year (i never expected them to) although they put on quite a lot of growth,the stems look a bit thin to me,I'm hoping that they fill out this year,i had a vine in a greenhouse before i moved house and it was very fruitful,have a look at the many varieties then give it a go