If you have 15mph speed tables (wide speed bumps) in your town, they are a good test for shocks. Hit them at 30mph, you should come over smoothly without sharp impact feel, bottoming, or bouncing after.
Mine have Chrysler emblems and are pretty rusty in spots. I doubt they are original, they still ride fine at 85k mi. (Just got the WJ last month).
Shock replacement is about as generic and as simple DIY as an oil change, talk to people about local garages or look for specials at the Chain auto part stores that install if you can't do it yourself. The dealers are usually a bit pricey, but shop around.
Check the prices of just buying the parts, you'll be shocked
at how much you can save doing it yourself!