Unknown manufacturer aluminum window

I am trying to repair a couple of windows in a circa 1973 home located in Melbourne, Florida. I'm starting with the two smallest windows, but this could blossom into a rework of 20 more windows....

The issues I am having are that a number of plastic parts are broken and the windows don't slide very well. I cannot find a manufacturer name or model written anywhere on any of these windows, but I looked around on your site and think I found some potential matches.

First, the "channel balance",which I think is a 377 model (see the first 3 pictures), but mine is 12.5 inches long, which places it right between 12" and 13". Will one of the standard lengths work, or can you make a custom length? It has the number 1210 stamped on it as well.

Secondly, there are plastic pieces on the aluminum sash, on the edges at the top of the track (see photo 4). One of these broke into pieces. I think this is a 18-042 sash guide.

The next issue is the take out clips broke when I tried to use them (see 5th photo). I think this is a 16-023 take out clip.

One last issue - the weatherstripping in these windows is shot. The "bubble seal" along the bottom of the sash is still there, but hard as a rock. It looks like "kerf mount" bubble seal so I will probably try out something. Also, the front of the sash had "wool pile" I guess but it has turned to dust from the looks of things. I will have to clean out the little track where it was installed and try to replace it.

I would need 4 of the channel balances.