Favorite hobby shop is the internet. The other type is 90 miles away. I look at practically all the web sites and sign up to have them remind me of sales and specials. There is usually a place on some of the web sites that allow you to shop by manufacturer. Tower's lists all types. Sig also has the same type of site. Anything you can think of can be found on most of the search parts of the webs.
Our local sales tax is 8.6%. Since I usually buy enough at one time to get free shipping from Tower, Omni and others I beat the local tax easily. If I do buy something that doesn't qualify for free shipping the cost is usually still below the local unreasonable sales tax. You can also check the links and find places not otherwise well known. Most of the manufacturers list a web site in their magazine ads. It works for me and anything that saves the gas and aggravation of a 90+ mile drive is pennies from heaven.