Well ... there are three different police uniforms in the store.
Real World Heroes Police Officer M4/H4, and it autofits reasonably well (and the female version)
Real World Heroes Police Officer (for M3)
Police Officer by Oskarsson (essentially a one piece jumpsuit, including shoes as an attached part of the jumpsuit, but actually for Genesis—there’s a thread about it somewhere in these forums) (EDIT: Jinx!)
If the issue is that they actually have Town and Country, and just want to work with that, then you could always try downloading fabric shaders from ShareCG and seeing what happens. Most of the paraphernalia can be found at ShareCG as well, as long as you know what to look for. (Management bears no responsibility for the possibly psyche-searing things you may see if you search for “handcuffs”.)