There's little likelihood you'll beat that B&H Photo price, given your situation - that's the same price I paid for my last two rMBPs, and I'm about to buy another AC package from B&H. I always get mine a few weeks before the 1-year period is up. My next new Mac might come from Adorama (see below, which wasn't available when I bought my last two Macs).
The only other "deal" is the "free" AC promoted by Adorama from time to time when buying a new Mac.
I also like what Squaretrade has to offer, but my current insurance covers what Squaretrade does and it's covered in my policy at no additional cost. You're past the 30-day window, so Squaretrade is out for you...
On a related note, we buy Best Buy's protection for our Windows laptops - when they crap out, we've received new, current units in place of 2-year-old PCs and they take the old unit. Nice, that. A little more expensive up front than Squaretrade, but there's a BB here on the island that's a short walk that doesn't eat up my overhead.