Where I live L&M fleet sells individual sockets, not sure if they have impact sockets though. (I use regular sockets with my impact wrench alot though with no trouble, even though I have a full set of impact sockets
) Not sure if you have L&M in the cities or not, but I've seen individual sockets at autozone before I believe it was...Best of luck.
hey, also, you said you pounded your ball joints out of your spindles, did you smack the ball joint or the spindle? The spindle is the way to go.