Well sure, the real thing is expensive... it's gold!
You want leaf of any kind, this is where you go.
Sepp Leaf
Most people are unaware of how many shades of gold leaf there are. Check out any of these charts. You will see variations in shade between different manufacturers. I personally prefer Dauvet, but it's thin even for gold leaf and a little harder to handle. I've also used Monarch (their chart isn't very accurate; I have the real charts with actual leaf samples), and palladium and silver leaf from Manetti.
Those who want to explore the possibilities with non-precious metal leaf should check out Nazionale.
It is not necessary to scrape away excess leaf if you coat the areas where you don't want it to stick with glair (egg white and water beaten to a froth and the liquid strained off-- glair was used as a binder in Medieval illuminated manuscripts; it pre-dates gum arabic).
Let it dry, and it will serve as a resist. Once the oil size (best is LeFranc and Bourgeois; I usually used three-hour) has tacked right, apply the leaf, let it harden up for an hour or two, and then sweep off the excess as usual. Let it sit for another hour, then gently remove the glair with warm water--don't let it dry too long or you'll never get it off!
The process of making gold leaf is truly astonishing and arcane. When I lived in a duplex in Belmont, MA, my next door neighbor was a retired gold beater for Swift. He was in his late eighties and still had forearms like Popeye.