SPECIAL NOTES: Stylish Spy will not work on sv_pure 1 servers. :(
So if you join a server and he appears invisible on your screen. Simply open your console and type in "mp_usehwmmodels 1"
What this command does is load up the original Spy, and you may continue playing on that server without any problems.
Simply type in "mp_usehwmmodels 0" when you return to a server without sv_pure 1, and the Styish Spy will return :D