Metal clad (MC) cable: cut or rearrange it? Plus other questions on the options to install it
I don’t know of any place that sells it other than a roll. But you usually can purchase metallic and non metallic liquid tight by the foot and put the wire inside that. 
There are both metal and plastic straps to secure MC.
I would say why even use MC if you are putting it in a raceway.

Usually there is a bag of anti short bushings with the roll look and make sure you get them and yes you need to use them unless the fitting has this built in.
 Inspectors do look for the bushing as many diy’s don’t know they are required.