Be aware that the new leather.../... is not as thick.../...
Really? My impression is, that the [American] leather supplied today by various vendors is really thick, nice product from prairie (or Pampas) cattle.
However, this causes problems when sewing/fitting it into our M-Bs of the sixties today, results in a swollen look (disappointing).
Also, the leather many times has a matte surface, much different from what was original. This may be due to the leather preparation methods and chemicals available today.
However, the comment from Stick is valid. Perhaps useful to request samples from some different suppliers before ordering.
One other comment; discussed previously, the leather has to be skivvied (thinned down) in order to fit nicely.
/Hans in Sweden