2012 Dodge 3500 SRW towing Jayco 334RBTS-which WDH?

I've been reading the equalizer instructions and it looks like I need to add maybe 2 spacers to tilt the head more. I looked on mine and it has 4 spacers on there right now and of course they didn't give me the rest of the spacers from the shop. So I'll have to get some or is this just a common washer that I could buy somewhere local?

Here are a few pics of the head setup:

Moderator edit to re-size pictures to forum limit of 640px maximum width.