Otherwise I think the only option getting someone who speaks Polish to record some for you?
You might talk to Polish-speakers over Yahoo or Skype, or at least listen in on public conversations there, if you're well enough along to make use of it. I haven't visited the Polish channels just yet, but I found both to be very helpful in the past when trying to improve my German. I know a bunch of people who visit this forum have Skype and sometimes volunteer to help others learn, as well.
As to the software/files you mention, my local library here (California) carries only those, unfortunately. I've checked the database as recently as yesterday even, and that's all I've seen - Pimsleur and the Teach Yourself series.
Hope some of this made sense. I'm sort of passing into opiate stupor right now and having the usual trouble typing. Good luck though, and let us know if you find something helpful! :)
