Go directly to SMS,....you'll be told it's "NOS" mat'l, and expect to pay a premium for it,.....it's NOS allright, just not "vintage" in age,....more like NORS (New Old Repro Stock)....but it's very good quality,....request a sample before commiting, esp if trying to match "vintage" exsisting mat'l,.....they also have the "salt & Pepper" in "other factory colors" and some different non-stock colors should you desire something unusual
Here's black and yellow from SMS custom installed on Legendary covers..."salt & Pepper" style
Mike