Add me to that list as well.
You all are correct. I too have been raised with the Hellgrammite name also.
They are quite available in the summer by many bait stores, here is a few I know of:
These are dynamite pan fish bait and the best ticket for perch. I have found NO bait store selling them for several years. I think they are labor intensive to catch and would need to be priced so high no fisherman would buy. I try catching them each year for Lake Michigan perch, but perching has dropped off so bad I don't bother anymore.
Is there somewhere they are sold? edit: Do you know the price?