Im not sure cause but I dont see why you need a rad.support?
You can cut the two fenders and weld and shape them togeher in right. Its just another way to do it -- no matter what you will be cuting grinding and probably uses some bondo!
what you do next is buy the parts and someone with experience in body work (that wont charge you up the rear) put her together.
Body work is something you want somebody doing that KNOWS what they are doing. Preferably a reliable shop, because if they skrew up you have a legit place to go after for retribution,whether it be financial return or FIREBOMBS!!!
