XL not L? PS, finding nice Western shirts is tough. RRL?
Kapital always do a few but it might be worth looking a BlueBlue - the regular BlueBlue rather than BlueBlueJapan line is more Western inspired - have a browse on the Seijin shop. LVC (or genuine vintage Levi, Lee etc.)? As you suggest RRL are always an option I find them a bit pricey for the quality, but their shirts aren't bad). EG always do a few each season too.