It will be hard to find a nice pendant for that price, except at HD or someplace similar. I have probably looked at thousands online, not kidding!, and most of them were around $50 up. I didn't think mine were expensive and they were $95 apiece. I was looking for cobalt blue and there were not a lot of them available. Maybe try EBAY or CraigsList.

Maybe? Listed as outdoor lights (which isn’t a problem), but possibly why you couldn’t find them.https://www.decorprice.com/acclaim-lighting-9316bk-belle-3-light-outdoor-hanging-lantern-in-matte-black.html?gclid=Cj0KCQiAlpDQBRDmARIsAAW6-DPFR99I9FA4uL-03-3pgZKGwb2Yc5reX5x1eoZ3RSNgcYlqLwwUwEEaAm4BEALw_wcB

https://www.lowes.com/pd/allen-roth-6-in-Brushed-Nickel-Hardwired-Mini-Clear-Glass-Bell-Standard-Pendant/50277441 This one is at Lowe's, I think they have more sizes and/or styles but this one lookes like a possibility. Also, try Home Depot.

Those look like Hudson Valley Washington to me! As for complementary pendants, I would look for ones that aren't the exact same, but do feature the same elements--clear glass shades and warm brass finishes. Here are a few ideas for that: Trade Winds Bubble Feiss Lawler Hudson Valley Rousseau Feiss Elmore Savoy House Epsilon Mitzi Neko Quorum Orb Savoy House Akron Mitzi Bella