I went with
RUNVSS
You could use:
RU*NVS (R U envious)
NIT*2WN (In it to Win)
LS3FTW (LS3 For The Win)
F7MFW (For The Mother ****in' Win) 
STOLIN (Stolen)
2L84U (too Late for You)
NVTHSS (envy this)
NVMYSS (envy My SS)
UR*SLO (Your Slow)
EAT LS3 (Eat LS3)
SUX*4U (Sucks for you)
NOSSTY
NASSTY
SSICK1 (Sick one)
1SIK*SS (One sick SS)
These were all available when I checked two weeks ago. (in the great state of TEXAS)