Some releases that might interest you:
http://www.psyshop.com/shop/CDs/dra/dra1cd066.html
http://www.psyshop.com/shop/CDs/cya/cya1cd001.html
http://www.psyshop.com/shop/CDs/cfr/cfr1cd013.html
http://www.psyshop.com/shop/CDs/dra/dra1cd036.html (good luck finding this one )
http://www.psyshop.com/shop/CDs/dra/dra1cd042.html !!! St Posford appearance
http://www.psyshop.com/shop/CDs/dra/dra1cd055.html
http://www.psyshop.com/shop/CDs/yoy/yoy1cd071.html
http://www.psyshop.com/shop/CDs/itc/itc1cd015.html
http://www.psyshop.com/shop/CDs/dra/dra1cd051.html
The great Ott once mentioned a possible "Shpongle in Dub" album (far far future)
Thou I must say that his "Around the world in a tea daze dub remix" is pretty average.
..oh and Umberloid. There's quality for you! Obviously Gargoyles as well
What goes for Abakus. He released IMO the most overrated chill album ever. It's very average.
Kaya Project is nicey but has nothing to do with dub IMO. I guess Bluetech has a few dubby tunes out there (thou personally I was never too impressed about his music).
Koxbox's Go Fly A kite is a little dubby I guess? I guess Interchill has some nice dubby older releases, but their newer stuff is rather mediocre..
Tripswitch SRSLY? Some of the most boring chill out there along with Androcell, Cell, Phutureprimitive, Solar fields.. this list could go on forever. Fuck there's a ton of sucky chill out there. Also I see the compilation thingy has taken over chill quite bad . Around 2000 it was mostly artist albums that were released