Tire Help?

I got the FATF3 350z. I'm looking to replace the rims but can't find anything big enough(1 3/8" or 30mm) I thought about the pegasus sleeves but I dont know how big those make the rims or what rims can be used in them. The Hoppin Hydros Slim 20's arent big enough. Are there any sources for like 1/18th scale rims? HLJ doesn't ahve any and tower hobbies didnt either. i'll post pics later.

~~Sneak Peak~~
Met. Black with Met. purple flames outlined in white
Dual aluminum mufflers

Look for it soon in the In progress section