The bellows came from a Beseler 45 MCR (IIRC) and should fit any of the Beseler 45 series enlargers. I can send measurements if it would help.
Condition is fair. There's one point in particular where the cardboard of the bellows has popped out of the fabric (pictured). This caused me some grief, and was the reason I replaced it. The same spot exhibits some slight light leakage.
All things considering, I successfully used these bellows, but they're just not 100%. Someone who knows how to fix them could bring them back to spec very easily.
The heat absorbing glass is by Beseler and is a 6x6 inch square. I'm not sure exactly what enlarger they fit, because it turned out that I didn't need it on mine. At any rate, it's a square, so don't try to fit it in a round hole!
Not really sure what a fair price is... how about $12 shipped for the bellows and $16 shipped for the glass, within the US. International shipping is welcome. Don't hesitate to make me an offer.