I am going to reveal one of my favorite vendor web sites. We do a LOT of marketing, and this site specializes in one thing, but it does an AMAZING job at offering great products at super reasonable prices.
WEB SITE: www.OnlineLabels.com
CHECK IT OUT - I mean it. You will never buy labels (some folks call them stickers) from Office Depot or Staples again. The concept is very simple - select your materials first (e.g., gold foil), then select the die cut. Or, select the die cut (e.g., Round 2 inch circles), and then pick from the array of materials.
They even sell synthetic (i.e., plastic) labels. These are great for printing signage related stuff since it won't matter if it gets wet!
Finally, their customer service is also great. In all the years that I've ordered from them, I've only had one instance where they sent the wrong labels (correct cut, wrong material). I just emailed them and they told me to keep or discard the old ones and they put the new ones in the mail the same day.