I am going to check out some old lumber yards, and see if they still
have some wooden framed windows in stock, but if not I guess I am
forced to buy these damn plastic things, which will probably fall
apart in a couple years after the sunlight and freezing weather cause

You could grab a router and some sticks, and make your own sashes.
It's fiddly work, but it ain't rocket science. What did you do with the

old ones?