I just measured my chest with a measure tape, and I have a 35,5'' chest, wich means that my size is 36 (46EU). But I have tried several 46 jackets, but none of them fits.
The sleeves are always too long and the shoulders are also too wide, and 44 is very rare. I am 5'7'' and 120 lbs, and finding a suit is very difficult to me.
Sounds like you might want to consider Made-to-measure (MTM). There are several threads discussing the positives and negatives of various MTM vendors (including quality and price). You might also do a forum search for "size 34 suits"; I suspect there are other fellows similar to your size who may know of vendors who sell size 34 suits off the rack (OTR).