Buy a used stock one... Go on NASIOC.com and search the classifieds... Only thing you will get for $200 is an eBay piece... and I'd stand clear of them anyways. I have seen manifolds crack in the past but this was due to running into a snow bank and with no undertray on the car. Try the gasket 1st because even if it's not the problem, you will still need a new gasket for another manifold.
PM me if you are looking for a stock manifold.
2002 WRX Sold
2007 WRX Sold
2007 STi totaled
2007 Foz XT sold