I ended up going with the Exide group 49 battery from Partsource. It was $125 after core rebate.
It's a little longer, so you have to remove the plastic tab in the battery tray, but it's got 850CCA so there's more cranking power and reserve.
Model BCI CCA CA RC L W H Lbs
49-60 49 850 1000 120 14 6.88 7.44 32
It's definitely not 32lbs though. It's just as heavy as stock (~56lbs)