Shopping around for a rough & tough differential cover for the Chrysler 8.25 differential can be a challenge. Try searching on Ebay and chances are you are only going to find the OEM covers or very expensive covers. If you or someone you know welds, consider purchasing a DIY kit from Blue Torch Fabworks located in the Birmingham, Alabama area. They have great shipping prices and were very fast to ship it out.
If you just want one already made then consider purchasing their differential cover ready to go for about twice the price of the DIY. Their prices are very competitive with just about anything else you would find in a catalog or even on Ebay. Not sure about Blue Torch Fabworks? Look them up on Facebook and they will answer your questions or you can view their pictures to see what great items they offer.