I tried getting a bored out 1 1/4 C bach mouthpiece......it was almost impossibe to do so. Unless I were to buy a stock mp and find a shop with the proper machinery, it ouwl be 6 monthes to 2 year wait. Although, this is a custom mouthpiece. I'm pretty sure that Washington Music Center (Chuck Levins) still has a farely good selection of Strads.....
http://www.washingtonmusic.com/