My suggestion would be to contact a custom maker, then you can get it to your specs within reason.There are a ton of them out there. The higher you raise the holster the less stability it will have, so you may have to comprimise a bit.Most of my customers like the higher riding OWB holsters as well.Below is one I did for a 5" 1911.Dave
And even this one could be raised a bit higher.
