first off if any place on your car other than maybe right on top of your exhast is getting hot enough to cause paper to combust you have some major probs... even the exhaust shouldn't get hot enough for fire... maybe burn if its in direct contact but not combust... and you should get a K&N filter to replace it anyway... oh yeah... what do ya think the stock filter is made of
check out the interior/exterior forum for help on the painting... the ppl in there could prolly help ya better.
and for the parts... like ya said look around at differnt places...