I have an Uncle Mikes (#3 or 9 I believe; check their length guide) for my MKIII BBL 5.5". It was around $20 from a local shop.
Apologies, btw, on the lack of info...
To make ammends, here goes a brief list:
**** Bianchi belt-slide holster (1911 model)
**** Uncle Mikes size 14 holster (per: http://www.wi####hs.com/knightsrealm/guns/22-45/holster/holster.htm)
**** Uncle Mike's 83062
**** Pro Packer Leather Holster
**** Galco DAO
**** Bianchi's Model 7000 AccuMold
**** Size 8 Holster from Pyle Mountain
Hope at least one of these helps!