Faz - make yer own! It's a doddle, you'll make it to your own spec and save a goodly few bob. Trend do an excellent plate (I'm pretty sure it's pre-drilled for Bosch) that you can sink into your bench for around £20, and the rest is pretty straightfoward.
The other thing you should buy for a home made table is a No Volt Release switch.
Fix it to the front of the table so you can turn the router on and off with groping under the table for its own switch. Much safer 8) and it also ensures that the router will not startup when you mend the fuse for the workshop after taking that :evil: very heavy :evil: cut.
I have a Bosch 500a and made an adaptor to let me use the Tend fine height adjuster, very good with the dovetail jig. If your intrested I might be able to find the rough drawing of it and post it here.
(Who knows Father Christmas is bringing more cutters )