The closest guy is Juan Centeno who has hit his way out of life as a minor league backup into minor league starter in the last few years. This year, the 22-year old, who is generously listed at 5'9", hit .285/.337/.342 in 79 games for AA Binghamton. While he makes contact (just 43 strikeouts in 79 games) there's little power here to make him more valuable than, say, Thole.
The Mets spent two top-10 picks on catchers in 2012, supplemental first-rounder Kevin Plawecki and 8th rounder Tomas Nido. Plawecki, a Purdue product hit .250/.345/.384 in 61 games in Brooklyn with 25 walks and 24 strikeouts. He'll start in a-ball.
Nido hit .242/.307/.339 in 39 games in Kingsport. As a high school draftee, he has a long way to go both as a receiver and hitter.
My pick here is 2011 second rounder Cory Mazzoni. He graduated to double-A this year, but in AA just did not miss enough bats (6.2 K/9, 16.1% strikeout rate) and 90 hits allowed in 80.2 innings on the way to a 4.46 ERA. Here's the thing. He's not a real big guy (6'1", 190lbs), and sits in the low 90s as a starter, but he can run his fastball up to 96 mph in short stints. He's working with a changeup (splitter) and a slider. I think he will make an appearance in the Mets' bullpen in 2013.