well i finaly got my charger on the road this weekend after importing it in march - well chuffed

and scared the crap out of the locals as well as snaking its way up the town bypass when i nailed it i was very impressed

but i have a few teething troubles-i need to replace my leaking header to engine gaskets (440), the ones i got from year one are realy thin and crappy and i don`t realy want to fit these as it is pain to change the gaskets so i want to do right first time. are there any good quality thick ones available? if so where? anywhere over here? ( i need an intake gasket as well)also my thermostat housing is still leaking after replacing the gasket and silicone as well. it seems to have warped and coolant seems to be leaking for the housing itself as if the alloy has gone porous, is there an aftermarket housing like on the small-blocks?
and my holley carb leaks fuel out of the float bowl mounting screw heads can i get these on their own or do i have to buy a complete carb gasket kit?
thanks for the advise
sean