Are these the ones you are looking at ButtMonkey?
LXSZC2
Associated Front Shock Kit B44
Can't find the rears though yet.
Can you tell I am bored at work with nothing to do?
So are the 501x really as good as these? I admit I haven't a clue and things have definitely change in the 15 odd years I missed. But tamiya shocks always gave me trouble.