I'm not entirely sure, but the guys at WAD seemed to disappear. I think there may have been a falling out between WAD and hifi World, but that's my speculation.
Anyway, Peter Comeau has taken up the gauntlet and got things going under then name of World Designs. My understanding, from announcements on the World designs forum, is that he managed to acquire all of the old WAD stock and is still in the unenviable position of sorting out the lorryfull. (I have purchased a Headphone kit from w-d and can vouch for their far speedier and accurate service than from wad).
From what I can gather they're going to replace the kits with new designs, but are selling off the old ones at the moment. Its certainly worth contacting Peter if you're after something that's not listed as he may still be in the process of sorting it out/ ordering missing parts to complete the kits.
the new W-D kits are the WD25a and T loudspeakers and there will be a new KT88 amp in the next month or so. Given Peter's enthusiasm I wouldn't be surprised if we see lots of new kits in the near future. meanwhile the old Kel84, 300b PSE and Headphone amp are currently available from the old WAD stock.