Growing Holy Basil at home

Might be worth contacting o'hanlons herbs in wicklow - they've been growing a lot of unusual basil varieties in the last few years so they might have some holy basil on the go. I know they had ordinary thai basil (aka horapa), chocolate basil, and lime basil which tesco stocked.

edit: just to add, I got a few pots of horapa off them a couple of years ago and found it far easier to maintain than ordinary italian basil - I ended up with a big huge potful of it growing on a windowsill well into the autumn, so hopefully holy basil is the same