I've seen several shops (in Europe at least) listing the Non-Reverse Thunderbird as discontinued lately, but an e-mail to Gibson was promptly answered. It's still in production, but they are estimating 6 months before new stock is available.
I'm no fan of the sound in most Gibsons I've tried (G3, EB0/EB3, Thunderbird, 90's Les Paul), but my EB 2014 is one of my favorite basses. From what I've gathered, the NR Thunderbird should be right up my alley too. I do like the looks of the LP Jr as well, but I'm afraid it won't be as hot and mid-forward as I want. How does it sound on a scale from the muddy SG to the hot and hard EB2014? I find mine to be close to P-territory when it comes to cutting through. An Epi Embassy is on my short-list as well.