I concur with Jeff and Jerry there is little you can do find a brake supply house near you and have your shoes relined. You may want to find an extra set of shoes for your truck too then have them relined as well and put them on a shelf in your shop.
If you do that then you will always have new ones on hand all you have to do is rotate your stock. You may wish to get some good hardware as well clean it up, put it in labeled Ziploc bags and store them with your shoes.
You can take your whole backing plate with the shoes and hardware installed too the brake supplier and see what you can still get new I would consider keeping a small wear parts stock on hand our trucks aren’t getting any younger, and what you can get today may not be there tomorrow you know!!! Remember to ask how many they have and how many they sell if they haven't sold any for some time they may purge their stock even if they have them on hand now they may be gone tomorrow.
