Blacklionaudio.com has the "mod kit" for sale. I'm sure that sourcing all of the parts they use (58 total) would be cheaper than what they charge ($115), but I hear their instructions are fool proof....worth the money just in that sense.

I'd like to hear more feedback on the mods because for a little over $200 you could have a kick ass 2-channel compressor if the mods are as good as I've been told.

That Alesis mod

Thanks Arthur for the pointer, but I have now bought a Samson S-com stereo compressor, for the same price as a 3630 and I really rate the Samson v highly. It has more features and those discrete stepped controls are a delight.