Where might one find a damaged / inoperable Nikon D2x?

Look on submerged riverbeds, on the seabed beneath jetties and boardwalks, at the bottom of mountain gullies or atop really difficult mountains (both next to dead climbers), and probably in camera shops which have been destroyed by fire, flood or earthquake. If you want to be really certain, then buy a new D2X and damage it yourself, it's the only way to be sure of getting one as damaged and inoperable as you require...

Alternatively just check the usual places like eBay, craigslist, gumtree and also at used camera dealers (particularly those selling to professionals) and also at repair outlets. The latter won't usually sell cheap though unless the camera is a total write-off as they'll want them for parts.

You could also ask on your local FreeCycle/Freegle groups.

Hopefully I've made you groan or grin and been helpful at the same time. Ultimately the answer depends upon whether you want a total wreck, a irreparable spares donor or simply an example which can be restored to working condition.