I collect Boy Scout Council Shoulder Patches (CSPs) but none of the older stuff. If it was me, I would watch eBay for a while, you're liable to find some similar items and see what they are bringing.

Below is a link to the Boy Scout collectible category. There are only 12,394 items for sale in this category so you should be able to find what you're looking for quite easily. Actually, there are numerous sub-catagories that you can use to drill down to what you're looking for OR you can build custom queries using ebay's search function.

Cheers!
Bill