Does anyone know where I can get a push bumper/grill guard that mounts over the stock bumper. I've been seeing them in parking lots but can't find them online.

I found one on craigslist for $35

If you're going for looks, something like that would be ok. But they are horrible when it comes to strength.

I'm not trying to pull anything with it. I just want some front end protection on the trails

I got a prerunner bumper of Ebay for just $140 and shipping. The brush bars are really not that strong, I wanted one till I saw one in "action" they dent pretty easy and can bend back into your grill. The bumper. Got will and has run over small trees, hit rocks and pushed full size trees out of the road after big storms. No dents, just a little more spray on bedliner to hide the scratches.
A brush guard will cost you over $200 on eBay, there is a guy that one eBay that makes off road cherokee bumpers for great prices. Just my 2 cent

Heres a pic

do you know his user name?

I'll get it for you when I get home today, several people on here have bought his bumpers

I have one (see pics) I may be selling it soon.

I found a guy named sam who goes by the name bumperbarn on ebay that looks pretty good selling custom made front and back for $325. Good feedback too.

Make sure they have unibody-tie ins if you ever plan on using them for recovery.

Ya, he its the bumperbarn guy. I bid on mine but you can also do the buy it now