Need aluminum window replacement parts

A handy person from St Petersburg, FL says:
Can you help me identify the parts needed? Swivel balance, etc.
User submitted image of their window hardware.
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Paul from SWISCO responded:
Thanks for posting. I believe this balance will have to be custom made. Before we begin, can you tell me the length of the outer tube? Can you also tell me how many you need? As for the bottom sash clips, see our 17-003. The nylon top guide is unfortunately no longer available. This window is very old and the company who made it went out of business.
A quick learner from St Petersburg, FL says:
The tubes are 16.5" and 28.5"

We have 3 windows that use the smaller size and 2 windows that use the larger size
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Tom from SWISCO responded:
Great! That's a huge help. Those lengths are a little atypical, but I think you'd be okay rounding up to 17" and 29". I'll email you custom order links for 6 of the 17" and 4 of the 29", including price quotes.
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