Alloy ones are
U3304 rear
U3556 front
Kit plastics are
U4182
The alloy front appears to give 10 degrees of kick up. So maybe a set of U3304 to keep the original suspension geometry.
Might be worth having a look through the links on here
http://www.racing-cars.com/pp/Car_Sh...T_K1_Aero.html
Specifically this:-
http://www.racing-cars.com/images/Te...o_Exploded.pdf