If you are going to get one, then my advice would be to pay the extra for the 200mm slides. It gives you a lot more useable space in front of the seat.
Also, see if you can get a fitting kit included in the deal otherwise you will be trying to get something fabricated yourself which wont be that cheap.
Best deal we can do for the moment assuming price is key & what you want is a cheap comfy crash tested seat that turns into a decent bed:
plain grey/black fabric (as opposed to expensive Inka etc)
no slider mechanism
no rear corner cut out (generally needed for rear corner pillar of T5) - but you can get around that by positioning the bed a couple of inches forward of the rear end of your van
shorter of the 2 bed lengths (ie 1860mm rather than 1960mm)
£1700 inc VAT.
Delivery £50 or collect from us in Yorkshire
option to add headrests: the cheapest ones are stick-on-top ones at £85 for a pair
Delivery time is 8 weeks as we need to order in large batches to keep costs this low.
These prices obviously liable to change so please don't quote me on this after end of January 2012 !!!!!!!!!