where can i get new bolts to replace them with once these are off...they're probably not gonna be reuseable.

BTW...when you guys are workin' on your cars, where do you let it sit on the jackstands...i've got it on where the lower control arm bolts to the chassis, but maybe it's just me, but i'm afraid if i put too much force into what i'm doing(i.e. trying to remove a bolt) it's gonna slip off or somethin'. i don't know, maybe i'm just paraniod, but is there a better place to place the stands where there is less of a chance of it slipping off or whatever?