You can buy a set of square washers the same thickness but they need cutting usually.
I can't remember the size but I have it written at home.
You don't really need those bolts as it's for toe on the spring bucket - but it depends on your set-up of course, which you aren't quite going to know until you've had some kind of alignment done.
I have the front DW camber arms, now I will warn you, these aren't the easiest arms to set. So you'll need a patient or experience alignment chap.
I've used Wheels In Motion for that, they have an great machine for it and very skilled alignment guys working there.
(where it differs to the usual places is that they can raise the car on the ramp, and the machine compensates for the raised car, so they align it in the air, drop it and check again - very nice)
You should have alignment checked out a few times a year anyway, just go to somewhere that offers free checking after it's set.