1995 Toyota Landcruiser Exhaust Manifold?

Engine Mechanical problem
1995 Toyota Landcruiser 6 cyl All Wheel Drive Automatic 187XXX miles

Hello,

I want to change the manifold on my car, but its so hard to find the part. I don't want to go to the dealer until I see I have no options. I've been to muffler shops and they can't find used parts and always direct me to the dealer. My question is would a 1996 lexus lx450 manifold fit on my car because they look the same. Also, Is there any other car that is similar to my car, like whats the difference between the 94', 96' land cruisers with my 95'? Another question, because my bolts on the manifold are so rusty. Should I torch the bolts before unscrewing them? Please help me.