Zak, if you don't take Tom up on his offer to sell you a attachment set, try The Henry Company in Hammond, Indiana. When I bought my 2015 Royal Metal upright, the 2 types of attachment sets were already discontinued. Thankfully, though, The Henry Company still had some sets in stock, & they were identical to the ones in your picture.
Also, a little tip once you get an attachment set - if for some reason you don't like one of the tools & you want to use a generic tool, use a black plastic tool adapter for Filter Queen canisters & Panasonic uprights. Just make sure the adapter you buy does NOT have the pin to click into the hose. The Royal hose in the deluxe set & the attachments are nearly identical to Filter Queen attachments because at one time Filter Queen was manufactured by Royal.
Rob