I was poking around the IKEA website today (as I often do) and came across some cheap chairs that might work for your production. -- They look a lot like the chairs in TUC, at least as far as I can tell. Not sure if there are IKEAs near you, or if they'll ship to you, but I thought you might want to at least check them out.
And, if you need armrests --
Don't feel obligated -- I just thought they might help!