If you ever have a question on what gear is compatible for the build, the Pro Tricopter Thread has a lot of users that answer questions in minutes. The thread is great.... it completely runs itself and is an incredible resource. Also, the key things to get are Motors, ESCs, an FC, and Props as well as bullet connectors and XT60 power connectors (if you use XT60). I sell all these parts and have them in stock at GetFPV.com.
Motors: 4008
ESC: Plush 18amp ESC
FC: KK Board (get a USB loader as well, but I'm out of stock on these at the moment)
PROPS: APC 10x47 (get all SF to keep it simple -- and I would get lots... at least 10, you'll need them)
Bullet connectors
XT-60 connectors
With this list you are 90+% there. You only need a Hitec servo, some 3/8" wood booms or 10mm if you can find them, and some silicon cable. Double check the list on fpvmanuals.com... I'm sure I am forgetting something.