Is that a UK based company? It looks like that's the only one listed on Ebay, and thats in the UK.

Phoenix, i don't know if this will interest you or not, but here's a site i've been following (a christmas site) that is running "coops" to get a circut board to make your own Solid state relays. With a couple extra parts you can make this into a stand-alone DMX dimmer pack. Look under the SSR4 link. Also some info in the wiki link on top. It loos like they can b built for around $30 each (don't know how much that would be over there...)

Do It Yourself Computer Controlled Christmas Lights - Index