Just bought an almost perfect 88 Raider with 40k miles. The "hat" on top of the reed valve (secondary air into the air cleaner) is rusted out and resonating with the exhaust. Looks like it is a ~$200 part? Do I replace it new or used? Block it off somehow? Go with ~$200 headers? Any other suggestions?

Thanks

'88 Dodge Raider with only 52,000 miles!
My upgrades:
Curt 2" receiver tow hitch
Re-undercoated the wheel wells
Gen 2 padded center console cover "armrest"
Highland all-weather front mats
Double DIN JVC Receiver
Power locks with remote