Do you believe that the FBI work in Canada in "uniform"?
As far as uniforms go, you can buy whatever rank of soldier/sailor/airforce you want at any Army Surplus store. Just don't try to pass yourself off as the genuine thing. As far as non-Police wearing real Police clothing...even a real Cop with a real gun,baton, pepper spray and backup, you can get hurt very easliy. There are some people out there who love hurting & killing Police/. Why put yourself into that danger. That's about as smart as pointing an airsoft or replica gun at someone with a real one that shoots back.