Check craigslist. How much depends on what they are asking and what you are willing to spend. I got mine for $20.

 

craigslist is always good. that's where I found my potential deal on this weatherguard I'm checking out. As long as the guy doesn't sell it out from under me, I'm picking it up Friday.

 

I'm not sure where or how much but I'm sure that their website list dealers. my truck came with one and it was a beast. notice its shipping weight is nearly 200 lbs. I sold mine with some surface rust and 13 yrs old for $150 so they hold their value pretty well.

 

They appear to be good, but not best. The latch is the kicker. The commonly used hook latch can be defeated. Rotary latches are much stronger, especially when protected in a built-in housing like Weatherguard and Delta Pro. The best latch however, is the hoop twist latch used by Highway Products and formerly used by Protech. I cannot find material thickness on RK boxes but it is probably 1/10" which is near the thickest. HPI and Protech still use 1/8" marine grade. Like I said earlier, thickness + latch = best design. But there is no doubt the RKI boxes look stout and would last a long time. I get a kick out of the "cult" following for UWS boxes which are among the cheapest and flimsiest boxes out there.