I did a list of the best (stock/non stock) spare parts that you could find for your UR65 and UK65/US65 drone.

Normally each parts works directly without any modification with the stock quads, if it is not the case I will add a specific note.

Frame

Canopy

FC

Motor

Propellers

LIPO

Camera

Flight Improvement

JST 2.0 connector

It seems that you can improve really your flight time by changing the JST connector with better one. You have more information on this thread:

So you need to change the current JST 26 awg for a 24 awg connector:

Problems

If you lost your RX connection you should take a look to this bug in order to disable the telemetry: