You may already know about it and are probably saying right now, "Stephen (because you'd use my first name, us being on such intimate terms - after all, don't you remember that week in Paris or the times running guns in Algiers? Tell me you haven't forgotten, baby.), I've known about this for years. Why are you telling us this now?"
To which I'd reply, "Shut the hell up or I'll take out your other knee. Now where the fuck's the heroin? Don't make me break out the bolt cutters."
And it comes at an excellent time, as I've just had two short stories accepted for publication in the last week and am trying to
unload my backlog find a home for some more of my stuff.
Check it out. Doing a search on print and electronic markets for mystery yields 77 results, some closed (but they tell you that) and some I recognize and have even been lucky enough to have my work in. Some of them even pay.