The SIG P232 just doesn't make any sense to me. It is a .380 that is bigger than my 9mm PM9. No thanks.
The SIG P239 is a single stack 9mm, but it still quite large for the capacity. The Kahr K9 is much smaller, but then you don't want a striker fired gun.
The S&W 3913/3953 is an option. You'll need to find a used one. I'm not a fan of slide mounted safeties so I'd prefer the DAO 3953, but those are harder to find than the 3913.
ETA: there is a 3953 on gunbroker:
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=391501074