Well that sucks. Although, I don't think the sizing should end up bigger since it is expected for size 4 to fit a 48 and not 50. Or maybe mine ended up being off. I do prefer last year's leather. It was stiffer and took more time to break in but the leather was thicker compared to this year's.
I'm thinking though with a 37" chest, shouldn't the jacket fit you since it is 40" around the chest area?