Unfortunately, cheap and "hose fittings" don't go in the same sentence. Those suckers are expensive. Jegs or Summit are the most favorite sites for purchases. They are competitively priced and usually have the fitting in stock. You could shop around and save a dime or two but by the time you do Jegs and Summit will have them at your door. Save the receipts. You will always order wrong fittings. Don't throw away the boxes either. All this will save you money in the end when you go to return them. Unless, you do like the rest of us and throw them in the bottom drawer of your tool box.
Also, I have found all the different manufacturers of AN fittings to be compatible with each other. Don't think all of your fittings have to be made by the same manufacturer. Basically, they all work. They can be a pain in the butt to make up. Good luck.