Yamaha DTXpress/DTXplorer/DTXtreme

It's been really interesting going back through the archives - but I 
can't see any mention of a UK source of the much discussed y 
splitters (although at least now I understand what I'm looking for!)

Same for a general internet search...

However I did come across this site if anyone else is having the 
same problem - it seems to be a Yamaha keyboard club, but the nice 
lady who answers the 'phone took the order and noted down the name 
of my 'keyboard' :-)

http://www.yamaha-club.co.uk/access_05.html

I've ordered a 'BCK-2JSJ' which sounds like it might work, we'll see 
when it comes.

Failing that anyone know where I might find the real thing?

Many thanks,
William