Signetics 8266

Hi, all, I've run across an old calculator that uses a couple of Signetics 8266 data selectors (selects one of two groups of 4-bit inputs). The problem is that this part is different than the 74157 -- it inverts one set of the inputs, and its select inputs are different. There's not enough room in the circuit board to kludge in a logical replacement, and I've searched high and low to try to find a couple of these. I'm positive that one of them is bad, as I can watch the inputs with a scope, and compare with the outputs, and there's one data line that is stuck high. Anyone out there happen to have one or two of these laying around that they'd be willing to part with for a reasonable price, or, perhaps know of a supplier where I might be able to buy a few of them? Rick Bensene The Old Calculator Wen Museum http://oldcalculatormuseum.com