[cctalk] Looking for TMS0106NC chip

I hope a 1974 desk calculator (Radio Shack EC-2000, a re-badged TI-3500) is considered sufficiently both classic and computer for this list. :) The one IC, a TI TMS0106NC, has failed and I'm searching everywhere for a replacement. There's an -0103 on ebay from the same family which would substitute, but it's only 8 digits and this is a 10 digit machine. Plus it's $31 with postage, more than the calculator itself is worth! If anyone has one, or knows where I can get this IC, new or a pull, please let me know. Thanks!