Delboy766

Hi LOC, have been advised that I need a new catalytic converter for my GS300 (registered 2000; 66k miles on clock) and I am having trouble finding the correct part and an OE supplier. Can anyone help? Was having trouble with exceleration and have had 2 lambda sensors changed and the ignition coils and HT leads changed, but engine managment light still on, still 'flutters' and does not excelerate cleanly at 3500 to 4000 revs and has no umph going up hills. Thanks