replacement exhaust cover

Hello,
 
i have a 1990 miata and the exhaust cover has cracked and rattles. i was looking for a replacement but don't want to go to the dealer, does anybody know where i can find one??
 
thanks
 

Is this the exhaust manifold heat shield that you are talking about? Is so you may be hard pressed to find an aftermarket source. Could try checking some auto salvage yards. 1990-1993 all use the same part number heat shield so should give you a broader search range to work with. Otherwise a dealer part is going to cost you $58.20 using OE part number B61P-13-380D. A little discount at www.onlinemazdaparts.com.