My female teammate is a backup bowler righthanded with good ball speed, throwing 15 lbs.  Her roll on the ball resembles that of a full roller.  Her setup has her holding the ball with her thumb @ 1 o'clock.  I have attempted to get her to hold the ball with more of a suitcase grip and let her pushaway get her hand into a more natural position, to no avail.

Looking to get her some new equipment / drilling which would help give her a little more sideroll and open her area up a little.  Any suggestions or thoughts.

My first suggestion is to take her to a good pro shop and get her axis point measured.  Mike Fagan "looks" like a high tracker but in reality he has a 3.5 axis point.  Russell is right though in that since a backup release is not "natural", it is difficult to achieve a good amount of axis rotation and "sideroll".  Side roll is not as important as you might think.  We just had a guy in our city roll his 100th 300 game and he doesnt have much axis rotation at all; maybe 30-40 degrees.  Main thing though is get that axis point checked out before anything.  After that, then we can pinpoint exactly what type of ball would work best for her.