"and with libertarians becoming more realistic about immigration and national security"
If the "big L" Libertarians weren't so incredibly naive about immigration and national security, I would be Libertarian. As it stands, I vote for the Libertarian candidate only when little is at stake, and swing Republican when it matters. Not that Republicans are acting all that conservative or libertarian of late, but the alternative is absolutely totalitarian, which is far worse in my book.
I understand the sentiment, here in Ireland we have nothing really right-of-center, let alone right wing, but most Irish conservatives look hopefully towards Fine Gael (main opposition party, formally a conservative party), and the Progressive Democrats (junior coalition party in the government, occasionally pays lip service to conservative ideology).
As for the largest Irish political party, Fianna Fail, which heads the government, it is, and traditionally has been, a left of center populist party, which is now blindly pro-EU.
Of course, though, anyone but Sinn Fein/IRA!!