Definately worth it, allows better front flex. I doubt there any out for the 05's yet. A company on the board just came out with some for 95 to 00 trucks for around $170.
Pull yours off and find a local fabricator, I wouldnt think they'd be hard to fab.
I built some for my 99 at home in about 2 hours, for about $10.
I used the stock lower connectors with a receiver made of 2" X 1.5" .120 wall tube notched and welded on it. A 5" X 3/8" threaded rod and a 3" X 1.25" steel rod tapped with the 3/8 x 20 threads bolts to the sway bar end, their held together in the receiver with a 7/16" pin.
Took 2 hours to make, required welding, cutting, tapping threads, and notching tubing, all work can be done with common hand tools. Cost about $10 including new stainless hardware, I reused the stock rubber bushings.
Contact Joey at [email protected]. he used to make some and has a lot of supplies left over that he wants to get rid of. I have some of his and they are great and easy to use. Remove two cotter pins and they are out.