Have you tried RHS Plantfinder? You can search for online stockists by post code there. Hope you find it.

Have a look on the net for stockists as well, Paperbath. You're sure to find something. I had one last year but wasn't very keen on it, even though they are quite spectacular to look at. It grew at a rate of knots and soon got much too big for the conservatory, so I put it outside and forgot to bring it in for the winter!! Hope yours fares better ..... Annie

Hi
Have a look at this ebay link this is the same plant I think this sale is for a cutting
http://www.ebay.co.uk/itm/PARROT-PLANT-IMPATIENS-NIAMNIAMENSIS-CONGO-/330601759585?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item4cf9668361
Steve