Good used condition Sport Coat from Spier & Mackay in the Contemporary fit.

Stated size 42R. Should work for a 40 too in my opinion

The approximate measurements, all hand-measured by me, are as follows:

Shoulder to shoulder: 18.5 inches

Pit to pit: 22.5 inches

Sleeve length:  25 inches

Length measured from bottom of collar to base of jacket : 29.5 inches