If that's the case, then I don't think that you will be able to find 20,000. Most of the members of the Libertarian Party (and, thus, I do differentiate them from lower-case "l" libertarians), as reflected by most Libertarian advocates on FreeRepublic, are all-or-nothing kind of people. If you don't agree with them on every little aspect of their agenda .. and that means down to the dotting of the "i's" and the crossing of the "t's" .. then you're a statist, a jack-booted thug, or a Republicrat/Demopublican.
There is no give to be gotten; half-measures are like no measures at all. To a Libertarian of this ilk, a Bush administration is the same as a Gore administration. Two steps forward and one step back is viewed as a retreat.
Theoretically, it sounds good. But, then, theoretically, so does communism. It's just that it is unworkable in the world of imperfect humans.