A banner that displayed your product and brand name but had no call to action might do the trick.
However, be aware that if you have a low CTR you will need to bid high to get those "tons of impressions".
Be sure to make an attractive landing page with information about where people can buy your products. Clicks that end up driving interested traffic to your retail partners should be cost-effective although they're hard to track.
Depending on how wide your distribution is, consider geotargeting so this campaign will only be seen within a certain radius of retail partners, rather than nationwide.
You can do banners advertisement with Interests based Targeting in Display Network. In this you can use CPM bidding and experiment with least CPM bid. In starting you can give 1$ CPM bid. And if it works than you can decrease your bid or increase your bid as per the impressions you are getting.