I'm using ZC 1.3.8a hosted at Lunarpages. The site is maintained for a community theater. We sell reserved seating tickets for each show plus subscriptions that are essentially a bundle of the three shows for a discount.

Because we sell reserved seats (each ticket has a numbered seat), I would like to be able to remove seats as they are sold (we sell by phone as well) so that you can't select seats that are already sold. I've searched the downloads for an addon that will do this with no luck. We have a program for ticket sales at the box office, but it's not web enabled. If I could move everything to ZC it would be great. Has anyone found something similar?

I am not a programmer and don't want to make a lot of code changes; I'm not averse to CSS changes, though.