Best way to replace my 1 piece Drive shaft with 2 piece??

[Bazooka]

I was wondering whats the best way to go about changing out my 1 piece drive shaft to a 2 piece??

Do I need to visit the junk yard?? What all do I need to do this? Need all info possible.. Don't know anything about them..

My truck is going full air ride and will be laying flat frame with the SD raised crossmember. I want to switch over to the 2 piece so I don't have to cut the cab floor for driveshaft clearance..

Any help is appreciated!!