Is there anyone that can help me restore my existing windows?

I have 20 year old BiltBest wood and aluminum clad window units throughout my home. Is there anyone in the USA that can help me to get my existing windows in operating order without having to buy new window replacements?

The original Biltbest Window and Patio Door products company has gone out of business. BiltBestWindowParts.com has access to thousands of oem and after market Bilt-Best parts, Truth and EntryGard hardware, OEM weather stripping as well as all the versions of the old Biltbest casement sash frames, double hung window sash frames and many other parts. You'll need to complete our information PDF and submit your information. Please include photos, measurements and any other pertinent information about your windows you can provide.