Crestline Casement Window Repair

Greetings! I'm trying to repair a Crestline Casement Window that was probably installed in the mid-late 1980s. The glass dimensions are 24" wide by 42" tall.

One arm is labelled "Entry Gard Truth".
One crank arm has the number "20810" stamped on it.
One crank arm has the number "31538" stamped on it.
One arm (a pivot arm?) is completely rusted and has become unattached from the window itself. A matching but opposite-opening window has this crank, with the number "30744" clearly visible, so it seems likely that this is one of the parts that I need.

From inspection, it appears that I need a new 30744 arm, the track that that arm attaches to, probably any hardware on the window that that arm is supposed to attach to, as well as a new slide where the window corner rides on that track.

I would also like to replace the weatherstripping that is supposed to sit around the window.

Thank you, any help that you can give would be greatly appreciated!