Andy is correct, a lot of us are out. I'm just in today taking in the mail. My initial thought is that you don't need to underbase the discharge colors. If you are using Illustrator to convert to CMYK though, you're probably not going to get the results, as Illustrator doesn't take dot gain and other issues into account for you. In my opinion, it's better to do the CMYK seps in Photoshop, then import into Illustrator and add text there. You may need to do a ton of reading to keep from wasting a lot of film and screens trying to get something that looks good. BUT, you really need to have a good understanding of CMYK, and then more importantly, what happens when you do it on textiles. Perhaps Tony P. or some of the other guys with more experience printing discharge can chime in. Maybe if you post an image of what you want to print, we can make more suggestions. Good luck, and don't get discouraged, and Happy New Year.
Steve