Rotor Crank Arm & BB Options for BSA (English Threaded) Shell

[ColonelJLloyd]

Thirdgenbird posted a link to this one piece spider ring which I think would be pretty slick on an all road build.

I'm curious what Rotor arms (or any other arms for that matter) are compatible with that spider ring and BSA BB shells. And, second, what BB options (Rotor brand only?) with said arms. I have no experience with Rotor cranks or any cranks on which the spider is not integrated.

Any info on best places to purchase the 46/30 spider ring, info on installation and tools require, etc is much appreciated. Thanks!