When shopping for plant material, talk to someone in charge of ordering the perennials, shrubs or trees. Seasonal help may be able to tell you if they have a plant in stock, but they won't be able to tell you if the store can order it. And consider a road trip to do some power plant shopping. There are wonderful nurseries and garden centers all over the state. If you're in search of a particular plant, call ahead.
New varieties are often in short supply the first season they're introduced.
The important thing is to let those who do the ordering know that there is a demand for a particular plant. Most are looking for the silver bullet, a onetime solution that takes care of the problem without harming the animals. The sad fact is, other than fencing, there are none. Bad tasting repellents that are bitter or hot do work, but they must reapplied after every rains. Odor repellents are effective also, but in a limited area, and they, too, must be reapplied regularly.