Sorry if this shouldnt be here, but i couldnt think on where else to post it.

Can some one please tell me where i can buy a 2.5" cat inlet flange to weld onto my stock cat so as i can bolt on a DC JDM 4-1 header. i need to retain the cat for emissions testing but can run any header i like so long as it all bolts/seals up properly (which it doesnt at the moment) Maybe someone has an old cat from some bigger car that they can cut off the flange and sell to me (i only need the flange)....please someone help, i already have the jdm 4-1 header on the car and it is blowing out ever so slightly at the cat as the cat inlet is only 2.25" and my car is due for testing in three weeks!