Thanks for all the tips, everyone! I did find more than one pair available, and ended up going with one that Rob at Smitty's tracked down for me--a new pair with Marker 1200 Piston Control bindings. Since it's close enough for me to drive, I won't have to deal with shipping, or with having to take them in to get the bindings set elsewhere.
If anyone's still looking, Nestors sporting goods had two pairs in 160 cm at their Allentown store for $479, plus another $180 if you wanted the Marker 1200 bindings (they have others, but I didn't get the pricing.) I didn't get around to checking the Quakertown shop. Also, in Massachusetts, the Ski Market in Shrewsbury has a pair of 160 cm with the IBX bindings for $615 or so. St. Moritz Sports in Wellesley, MA, has a pair of the 167 cm for the same price.
And again, everyone, thanks so much for all the help with this! It's very much appreciated