wheel shims

[makana59]

Hello Guys,
I guess Im wondering where can I get shims for the emaxx. The problem area is at the wheel area where the rim connects to the CVD. When I tighten the rim to the cvd the tighter I make it the wheel does not spin so freely. Someone had mentioned to put shims between the cvd and the hex that goes on the rim. But where can I get the shims to space it. I have none thats why. If you give me a place to get can I please get the link to the page. Thank you guys so much for all the help as usual. Makana