Three ideas come to mind.
1. I see you're Subscribed. You might consider joining an Agency. Often, agencies will either loan or give their people equipment that they need/want. The detective may or may not have to pay the agency back for the gear, depending on the policies (ie.-rules) the agency lives by.
2. It's much maligned, but in New York, there's a little place called Big Lucy's Cabaret. Any detective can go there for the right price (and at the right time), and, with a little bit of luck, possible acquire a brand new stylish chapeau (that's French for hat ;-). Down side to Lucy's -- prices are a bit more expensive than normally, and you may need to make multiple trips to find just what you're looking for. But this is a valid option for you, and it does not matter if you're Subbed or Unsubbed.
3. Again, since you're Subbed, you do have some advantages over the average Joe. One of them is the ability to travel. You might consider going to another city and seeing what lies in the borders there. One never knows what one can pick up in an exotic locale (especially if one gets to know the locals a bit, ie, -- go hang out with a Faction or two. ;-).
These are all possible options for you. You might consider trying any or all of them. Hope this helps a bit. Good luck with your wardrobe expansion. ;-)