About 1.50/ea
on Ali
Note the 19mm and 22mm have the same size indicator, just a thicker bezel. I opted for 16mm as they're the most shallow. Also, they are chrome, not black chrome. They have an internal CLR as well.
I bought some of the tricolor 12v ones as well but they are common anode not common cathode as pictured which is good imo. If all 3 are connected, green will illuminate. Red and yellow will turn on simultaneously. Could use in a combo build. Of effect red, the other yellow, both orange.