Try http://www.murrays.com/closeouts/closeouts.html#wetsuits for close-out prices on wetsuits. The wetsuit manufacturers sites have some advice on what to buy for your needs.

An owner died during a very recent transatlantic race after falling overboard. He was clipped to the rail before the fall. His brother was his crew. The man overboard could not be pulled back up onto the boat. I'm only guessing that his inability to recover the skipper, even though he was very near the boat, had something to do with the fact that the he was becoming hypothermic and his ability to help himself had been greatly diminished. He was too heavy for the brother to lift. After discussion with race officials the skipper's body was set adrift in the life raft with an EPIRB. Crew members on other boats had to help the brother sail the boat the rest of the way.

Personally, I think 52 deg. has the great potential to render you helpless (my first draft said "kill you")after a difficult-to-recover capsize without some sort of torso warming suit unless you're already really close to shore. Carry some safety equipment; horn and flares. Since I singlehand a lot of the time I sprung for a handheld waterproof VHF last year. I've been hypothermic once. After that I bought a "shorty" wetsuit with 3mm titanium layer for warmth. If you're going out there you really should spring for the bucks for the equipment; even if your brother is on board to help you.