If you deal with almost any manufacturer or distribituter in a professional fasion and they beleive they can derive money from you, you can get any cross referencing material you want for only asking. And what you're asking for is cross referencing stuff.
The reason they'll give you the material you need is two things. One, they like you, most important. Two, they know that you need a place to buy this stuff, that can be them.
When you make connections in the industry, usually, everybody benefits.
For you and the distributors, it's usually a win, win situation. Just view it like that and remain somewhat humble and you'll see what I mean.
