Flanging, chorusing, phasing and the like are very similar to that effect, so you may want to look into the A-125 or the lower numbered A-188-1s.

There are other ways of widening a sound too. After watching the making of Nirvana's Nevermind, I just started doing what apparently pretty much everyone used to do, which is recording some parts twice, and panning the two recordings separately. This works particularly well with slightly unstable modules like the A-106-1, which will sound everso slightly different on each take, giving you an interesting stereo effect. The only hard part then is to replicate all your expert knob twiddling in each take, but if you need to do it precisely, you can always draw the movements in your DAW and send them out over MIDI CC channels via a good MIDI to CV converter such as the venerable MCV-24.

The technique you're doing, duplicating the exact recording and offsetting it slightly, is also good, and can just as easily be done with recordings of modulars. Personally, I wouldn't try to change that technique by replacing the DAW with a module or two. I think a modular synth is a fine instrument, but a DAW is still necessary to do the actual recording and editing. :)