Do you know of a cheap dupe for Too Faced Lip Insurance Primer?

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I got a sample of this stuff from Sephora recently, not expecting much from it, but I was really impressed. Damn! I hate it when I like expensive shit. But this really makes lip gloss work better: it makes it more pigmented/brighter/darker, and it sticks and lasts significantly longer. It's some kind of magic. I've been looking for a cheap alternative without any luck, though it seems like such a basic product. Does anyone out there know of one? I am really reluctant to spend $20 on a full size tube of this (or anything else, really) - but I like it enough that I might have to. I want to make sure there isn't something less expensive out there first, though.

I'm thinking I might try some eyeshadow primer, though most of mine have some kind of beige or white pigment in them. I will report back if I have any luck.