Have owned a 2007 FJ for 10 years now and it's starting to show its age. In particular, I now have a leak from a rusty rear diff cover. I just noticed it is non-replaceable but have heard there may be weld-on replacements available. I have seen covers for other Toyotas (Dorman), but no listing for FJs. Wondering if anyone can direct me to the correct item. I'm hoping I'm not the first to have to deal with this problem! Thanks in advance.