Decals have to be submitted and pass quality control until you have established your reputation such as us with decadesHave to be a viable company with good credit with proof. IT is getting harder and harder to be licensed and FCA really comes down on infringers as well as GM.
Pre masking tape has no markings on it . It's the tape usually clear you remove after you applied the decal. The backing paper on the back you peel off before you apply the decal lets you know what quality is . I had my print Manager look up the numbers on the 3M database you quoted and he has no idea what you are looking at. Be advised there are 3M Chinese knock offs of vinyl. Regarding a discount you would have to call and talk to a salesperson to ask.