also TASCA, Rockauto (I think), FCPGroton, etc etc are all pretty good sources. Although not sure what they'll have.
As far as the Trans Fluid Filter... Are you positive that you need it? Because IIRC the way to get the filter out is to basically disassemble the transmission itself. These aren't like most automatic transmissions that have a singular large filter at the bottom of the trans case.
i always compare brands/prices with rock auto before ordering from FCP... sometimes rock auto has things a good bit cheaper. (sometimes enough to where one item and UPS ground comes to the same total as FCP w/ free usps shipping)