If you can wait, are there any annual swap meets at large venues within a reasonable driving distance of your location. Most are usually in the summer months. Vendors usual set up and if you get a vendor list in advance you could reach out to them to make sure they bring the needed parts with them for you.
Try this link to search for events in Washington. It looks like there is one in March if Yakima is anywhere near you.
Oldride events list - Washington
