No dealer will have 80 series parts in stock, unless they're still used on current models. Any dealer, including the e-commerce sites, will be able to order it, and the storefront dealers will be able to get most parts, like this one, next day...
FYI, the rubber filler channel for all 4 window regulators are available new. After 30 years or so, they'll be done.
69971-60020 for the front windows. About $12.
69971-90D00 for the rear windows. about $9.