You can always try shopgoodwill as well. Kenmore isn't usually a hot model there so good deals can be had. I have a 158.18130 and it's a super solid machine. I bought it for $30 and cleaned out quite a bit of thread then oiled it up. She runs pretty sweet now. I think I have $10 in other parts that I replaced and I need to hunt down some cams for it.
Texas is hard for machines for some reason. Be patient.