As suggested by charlie1465 over at ECF, we are compiling a Billet Box Bridge List. The list is separated into two sections, one for RBA Bridges and One for Coil Bridges. The RBA list are bridges where you build your own coils and the coil bridge list is for bridges that allow you to use premade coils like Kanger OCC coils, Vapresso EUC coils, etc.
Also included is a list of known coils compatible with the bridges included with the stock Rev4 Boro and the A-Tank from BBV.
Here is a list of my favorite RBAs.