Some local nurseries sell them, or you can order them online from Amazon, or a grower's supply store. For me personally I make my own hanging baskets and it is a lot easier than you might think. Most of my nepenthes are too small for the large hanging baskets you might find at lowes. I take the pot they're currently in, poke 4 holes around it, take a long strand of metal wire (they sell a floral wire on Amazon that I like to use.) fashion yourself a hook out of it and you're all set. I'll try to find a link of the video where I found this idea. Much cheaper and you can customize it to your hearts desire.
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Exactly what I do. Take a standard plastic 6" pot, one of these , poke 3 holes with a screwdriver whose sole purpose in life is to create hanging baskets, and voila. Easy to repot or upsize the plant (just detach the hanger), extremely affordable, stable with weight. I'd never be able to do the Nepenthes or orchid collections without this method of cost reduction. Teak baskets are lovely, but if you've ever tried to repot an orchid in one.... try it sometime! Not to mention you'll be doing it without the arm and leg you spent on buying the baskets in the first place. Not a big hit for a few plants, but spending a dollar or more per basket vs 15 cents of plastic.... not practical with a large collection.
I was speaking strictly from a hobby's standpoint, but I can see where the cost would add up in a collection the size of the one you maintain Kevin. I haven't had the pleasure of repotting a basketed orchid yet, but depending upon the orchid I'm sure the experience would range from tedious through mind numbing to rage inducing.
I have some nice ones from ebay that came from China. Bowl-shaped and different colors. They have a small reservoir with a hole in the side, This is great for me in the summer so my plants don't dry out. So far after a year the chains have not rusted. They were super cheap, too. My wife likes them because they make the front porch prettier. Happy wife, happy life, Haha!
I also use some line to make a net-type pot holder. I found one on sale and bought it, and now I make my own with 600lb. test kite line and a fishing swivel. So much easier and you can make custom sizes!
Here ya go, the only difference is mine are 25cm diameter. I went with a little larger because my plants regularly see 90+ in the summer, a little more lfs to keep things wet. I don't use the plug, so any excess water just drains out.
Flexible Garden Home Decoration Hanging Flower Pot Chain Plastic Planter Basket | eBay