A sugestion on purchasing vintage and traditional dive gear. Go to every dive shop you pass, visit older friends and relatives who were divers and see if you can get their gear. Vintage is usually considered to be gear made before 1975 or of the same type, form, function and style.
Anyways, I tell you this as an alternative to ebay where you will find that prices have gone quite high as of recent. I have as a result layed out of ebay and am finding my treasures other places--mostly. Traditional gear is easy to diveactually and the links given you can help you service the regulators.
I loved Flipper also as a child. Look for either Voit or USD doble hose regs. They have good parts supply and perform well--that is if you intend to dive them. From a collector poit, the field is wide open, collect what you like but just keep in mind that other than Voit and USD parts can be problematic though not impossible. Good luck fellow Flipper friend.
PS- Let me add, several folks in the vintage community are manufacturing things like vintage dive harness for single tanks and other items such as neat vintage t-shirts. You can find links to both on the VDH we site. The VSS site will also be very useful to you. Hoses, diaphrams, rebuild kits, fins, masks, harness, new and improved parts are being made, yes it is a resurgence, a renassaince. The future of diving is traditional.
N