Try securitytravel.co.uk. They are very good for the Canaries.
Your travel agent should be able to advise who the hotel is being sold by - it might be that you have to do it via an agent rather than direct.
I've just googled it though and there are plenty of places coming up advertising it on the net e.g. holidayhotels.com
Book your flights separate and then book the hotel direct via there website. It is a lot cheaper!! The transfer by bus is 3 euros each and takes 20mins or get a cab (40 euro (ish)).