This letter suggests to other similar corporations that you organize a focus group of industry vendors and clients to discuss their needs and concerns.
1234, Main Street
Boston, MA 02123
<Recipient Address Goes Here>
At Abc Company, we realize that vendor and client feedback is becoming more and more critical to doing business efficiently. After all, if we don't know what our customers want, we can't give them the products and services they need. That's why I'm writing to ask if <other company name> would be interested in helping organize a focus group for a selection of <your industry> vendors and client companies.
What I'm proposing is this: <description of focus group>. All you would need to do is contact some of your vendors and clients and find a few who are interested in having their views heard.
<work you need from the other party>.
I think such a focus group will let our vendors and clients know that Abc Company and <other company name> are committed to serving their needs, and will be a genuine avenue to greater profitability. I will give you a call <time you will call> to talk over the matter further and see if we can get this together. Thanks for your attention.
encl: <List of enclosed items goes here>