Im doign the same and have my list in front of me now. You will need x2 mannifold gaskets, x2 turbo to mannifold gaskets, x2 f/pipe to dump pipe gaskets, x1 f/pipe to cat gasket, x2 turbo intake gaskets, x2 turbo outlet gaskets, possibly dump pipe gaskets if you have removed the sump pipes off the turbo's? and also you may need the 2 gaskets on the turbos for the oil return lines.. There is a gasket the goes between the front turbo and the pipe that says 'twin turbo' but you will only need one of those size gaskets assuming you havent taken the little adapter piece off the front turbo outlet?
Hopefully i havent confused you too much! If you need anymore help i can describe thiongs in more detail...
Deren