I think that
Springbok makes such a holster that they call the "Total Cover".
Better yet,
Citizens of America has a deal running where if you donate $100, they will send you any Springbok holster (up to $57) for free!
I have not used any Springbok holsters, but I have donated to Citizens of America and it is a great group doing fantastic work with their pro-gun ads.
[This message has been edited by Dizzipator (edited September 27, 2000).]