If you have a look on UKTactical, you can get a molle adaptor for an IMI Holster, allowing you to mount the holster on your molle vest if you so wish. The holster also has a secure lock and can rotate into a position that suits you the best.
Yes I really dont like leg holsters, I use the condor universal chest holster, its fully adjustable so if u ever switch pistols your good to go. However its quite large, although it offers good protection and good security, your draw wont be as fast compared to one of those molded ones.