Thanks, both, for your replies!
I plan on commuting regularly this spring/summer on it, mostly because I'm leaving "jacka** early" since office attendance is mandatory now, and the pipes on my BMW at 0545 is a dead giveaway to my dodgey neighbors that I'm leaving for the day. Ninjastealthbike is much preferred!
I found some on eBay, but the price has gone up to the point that I might as well grab new ones from Aerostich since they're on sale. The Enertia's the only bike I have currently they'll fit on and I don't see myself going far enough to need the larger of the models, but I might as well just in case I wind up with another GS down the line. If I find any clever method for mounting (or, utter frustration) I'll post an update to this thread.