I'm looking to replace the Scion center caps with, well, anything. TRD, bB logo, T logo, anything. I'm fine with ebay knockoffs, but I don't even know what to search for. Are sizes standardized?

Thanks!

do you need the whole centercap or do you just want to replace the emblem inside?

http://cgi.ebay.com/ebaymotors/Toyota-Tundra-TRD-Supra-Tacoma-Matrix-Wheel-Center-caps_W0QQcmdZViewItemQQcategoryZ43961QQihZ001QQitemZ110200859396QQrdZ1QQsspagenameZWDVW

either/or. I'm looking for something more substantial than a flat sticker though.