How do I approach other businesses to offer referral incentives?

Hi everyone,



I am a designer and I started my business back in 2007 - it has been stagnant for the last few years since I had a couple of kids. I would really like to revive it and get things going again.



One of the things that I have been doing is high end, custom designed wedding invitations and announcements - that sort of thing. I would like to approach other wedding vendors such as bridal shops & event planners, give them postcards that they can hand out to their customers and offer them some kind of commission or something for people they refer to me. So my question is - what is the best way to do this? How do I request a meeting with a store manager & make this kind of offer/request while sounding professional? If I offer a monetary incentive, what kind of percentage would be appropriate? I have never done something like this before so I'm not really sure how to go about doing it, and I don't want to make a fool of myself.



Thanks for your help!