Car parts. Shortage? We can’t resupply our store

This is a long shot, but is anyone here aware of non-traditional sources for domestic brand car parts in the Seattle area? We’re trying to restock our shop and our typical suppliers in the region are all out of stock and aren’t sure when back orders will be filled. We’ve found some in Southern Idaho that can be shipped, but it’s not cost effective for us. This is the first month in 30+ years of our family owning the shop that we’ve been unable to source some critical parts, and my parents are asking me to help.