please tell us because i agree with will why would you need 2 oil filters? only thing i can see out of this is more long term cost of maintance going up because you have to buy 2 filters everytime you want to change your oil.
JEGs and Summit also carry them. I think you'll want a remote oil filter adapter, some Aeroquip lines, and a dual oil filter mount for either Ford or Chevy style spin on filters. Or you could go big ballin' and get dual CM filters.