Washers for shock plates

I guess over the years I have managed to lose all of my concave washers for the shock plates. I did a little searching on the net and checked with a couple of the box parts houses(who look at me like I've got a third eye when I mention shock absorber hardware)but didn't seem t find any. Does anyone have a suggestion where to get replacement concave washers for the shock absorbers?

pretty much every rear wheel drive mopar build before the 80 will have these. id hit the yards with a 3/4" socket and get you a set.