Region Offroad is a legitimate business, and they seem like good people, but the nutserts they sell are off-the-shelf nutserts. Jeep used a custom nutsert that is much more robust than those. Region uses the off-the-shelf ones because the OEM-style are not easily acquired since Jeep stopped supplying them.
@mrblaine (Blaine Johnson) is the owner of Black Magic Brakes. He's an active forum member on here, and perhaps the most knowledgeable person on TJs out there. If he sells a product, you can bet that it will be top-quality.
Years ago, he sought out, and found, the original manufacturer of those nutserts for Jeep and was able to order them, but they had a high minimum order. He had to buy thousands of them, investing tens of thousands to do so. We are all lucky that he made that investment to provide an OEM-quality solution to the nutserts loosening. The OEM nutserts are definitely worth the higher cost. His next step in the process was to develop a relatively inexpensive tool to install them. His tool prevents damage to the threads of the nutsert during installation.
I've used his tool and nutserts more than I should have had to. It's a
long story, but due to a machining error by the shop that I had countersink the custom skidplate that Mr. Blaine helped me acquire and make for my LJ, I ended up installing his nutserts with his tool 22 times in my LJ frame. It's a great system and well worth the cost to know that my skidplate is attached to the frame as securely as Jeep intended!
Note that Jeep used SAE 1/2-13 bolts and nutserts up through 2002, and then in 2003, they switched to metric M12-1.75 bolts and nutserts. If your 2005 has the stock parts on it, make sure you get the M12-1.75 parts. Mr. Blaine sells the nutserts, the tool, and replacement conical-head bolts. If you're on a tight budget and only need to replace the one nutsert, you can get a single nutsert from him, but my recommendation would be to replace all of them because if one came loose, the rest are probably close to doing the same. You also don't have to buy the tool. It makes the job easier, and prevents damage to the nutsert threads during installation, but if you are careful, you can install a single nutsert without the tool without too much trouble. The tool comes in really handy if you're going to replace more than one, though, and for that sized job, you'd want it.
All that said, I don't know if Black Magic Brakes is currently shipping orders outside the USA, so that may be your biggest hurdle to overcome. I know that he's had issues with international shipping and given up on it. If you're close to the border, perhaps you could ship to a US address and drive over. I tagged him in this post, so he's likely to respond and let you know the current situation and how you might acquire his stuff in Mexico.
Everybody has a right to be offended and I don't want to deny anyone of their rights.
