Available at Volks USA. Includes two pieces of plastic, a washer, and a screw. I bought this secondhand, so after the exchange rate and shipping, I estimate I paid about $12.
I already had the brass pipe and the epoxy putty because they were left over from other projects. Based on how much I used, I'm going to say I paid $3 for them.
14-gauge solid copper wire. This set me back about $10.
Bent the copper wire sort of in the shape of an actual Volks saddle stand.
Done! Now let's see how useful this is.
Because of her skirt, you wouldn't know how ghetto the saddle stand is if you didn't see how it was actually made. ^_~
The wire is flexible but still strong enough to support the weight of a 60cm doll even if she becomes slightly unbalanced. 14-gauge solid copper seems to be the right balance between strength and flexibility.
The total damage to my wallet for this project was about $25, and I still have a lot of wire left. Considering a real saddle stand will set you back $55 (wood / metal) + shipping (+tax if you live in California), that's pretty awesome if you don't mind how ghetto this is. (I certainly don't.)
Another positive aspect of this stand is, if I want to take a doll to a gathering, I have a small, light, yet sturdy enough doll stand I can throw into my Dollfie bag.