where would be the best place to get a decent pair of these? i bought a pair about 18 months ago when i renewed all my front suspension on my [then red] 3i. the front is knocking ever so slightly now, so i can ascertain that the lower ball joints are worn. ive probably done 5 or 6k on these arms, but the roads in Yorkshire are horrendously potholed, and it is lowered 40mm.

do i go for a pair off ebay? another pair of QH ones? or is there a place that i can get some better quality ones?