Rear suspention and for a change not shock related

[robcole23]

hello all, im thinking about powder coating the rear sub frame trail arms and lateral arms ect on the one. Wanting to still use the car i went to the local subaru breakers and picked up what i thought were the right parts from a 2004 wrx (steel lateral arms like on my wr1) but now i have got home i have noticed that the anti roll bar mounts on the lateral bars are totaly different using a horse shoe shaped bracket, the breaker did however have a subframe etc from a what he thought was a hawkeye sti and it had alloy lateral arms. dose any one know if this would be any good for a wr1 or what car i could look for to get the parts from (apart from a wr1) ??
sorry for the long winded question
rob cole