I installed a set of 60/40 seats from a '93 x-cab in my last project truck('86 X-cab), and the outer mounts lined up with the original bench seat bolt holes in the '86, all I had to do is drill new holes for the inner fronts. The 2nd gen seats should bolt right in, you might have to enlarge the hole on the seat mounts, but other than that it shouldn't be a problem. The only thing that would be an issue(for the new owner) is that the passenger seat on 2nd Runner(4dr model), isn't designed to slide as far forward as the 1st gen seats were.

Other seats that should be a direct bolt in would be seats from the same era Celica, MR2, Corolla, and possibly the Camry. Seats from the '89-94 and '94 to '99 Celica and MR2's, and the Paseo should also work, but I am not sure if they are going to be a direct bolt in. The outer two mounts should line up, but the inner ones may not. The '94 Supra seats I installed in my '91 weren't a direct bolt in, the front holes lined up, and the rears almost lined up, but the of the rear of the seat would have sat too low, so I had to fab up some brackets to lift the rear about an 1.5".

If you have a line on some 2nd gen buckets, you shouldn't have a problem installing them, definately nothing along the lines of having to make new brackets.

You should order some CRV brackets for your Recarro seats, then mount the current Recarro bracket to the CRV seats, this would be the easiest way to do the swap.