My rear window blew out and I need to replace it - cost of window is $502.86 & rear tailgate @ junkyard is about $90 - so has anyone replaced the rear tailgate? How do I do it?

Did it years ago with a Dodge Colt. Takes 2 people. Hinges at the top and probably a wire or two needs disconnected. Guessing all you need is a 12mm socket. It's somewhat heavy and awkward so remember, 2 people . 

at least 2 people - 3 would be better. (at least for me it would) one person with the tools - 2 to support the tailgate (one on each side).

 

check for any/all wiring, washer hoses, etc., that may need to be disconnected - not sure how wiring was run on the later models, but on my 1990 the wiring was run up under the headliner panel - took a bit of work to get it down enough to unplug connectors. Once wiring is disconnected, unbolt the support struts (this is where your help comes in - to support the tailgate when these are disconnected) then unbolt the hinges up top.

 

Installation is the reverse. Hinges first, then support struts, then reconnecting wiring and such

Yes, I think the wrecking yard is the best approach. +1 on advise about it being a 2 or 3 man job. Tail gates are really heavy and cumbersome.

If the tailgate-hinge is bolted on using shims, then make sure to have some extra shims on hand.

That would help to get the new tailgate aligned properly.