Yes, as the season goes on, there will be a lot of peacoats available.
If you haven't done so, you need to look at my guide on Peacoat Dating, which is in a sticky at the top of this page. There is a section on fit toward the end. Your actual chest measurement and the p2p of the target peacoat are important. Don't only go by the size you normally wear in a suit coat or the stated size of the peacoat. While usually accurate, peacoat sizes should always be compared to the actual p2p of the coat.
I have, and I measure out to a 38.
Followup question. Shorts seem to be in short supply, but there are tons of 38Rs on eBay. I know sleeves can be shortened by any halfway decent tailor. Can peacoat hems be shortened without any ill effects? Main concern here is whether a 38R and 38S have similar enough button placement that a shortened hem on a 38R won't look too weird.


