It's possible I have something but there's two potential issues.
1) Might not be what you're looking for-- but I have OH tapajos. Have an adult breeding pair I'm considering parting with. Nice pair, you can see them in my avatar and photo gallery. They've produced some very good looking offspring. In fact, some are so nice I'm thinking of keeping a group of the offspring and letting the parents go. I have juvie/sub-adults available from this pair, couple of the larger males are already exceptional for their size, highly colored and starting to act like they're looking for love. Haven't put a ruler to them but a number of these look to be in the neighborhood of 4 inches.
2) Distance. Looks like I'm 4.5-5 hours away from you, though we could arrange a meet.
Price for juvies probably something like $100 for 4, $120 for 6-- except that, as I said, a couple of the dominant males in this group are already highly colored and I'd want a little more for one of these (I'm definitely keeping one, maybe both of them, although these males are in different tanks and I expect another male would move up in status and color if I move one out). Plus something reasonable for gas to meet somewhere. The adult pair-- I'm not ready to post a price for them, but we can talk if you're interested.
No offense at all if they're not what you're looking for. Not in a hurry to move them... might advertise them in the near future-- just not sure yet if I'll to do it here or not-- or might let them grow a bit more and ask a little more for them...