not sure if anybody on here grows fruit 'n veg etc - but i'm having a thin out on my allotments - and have a fair few roots/canes of a terrific cultivated blackberry - huge fruit, very juicy - not quite such a thug as it's bramble relative - easy to train (does have prickles)
canes have been cut right back so could post (assuming you pay postage) pm me if you want some