A customer of mine came into the shop looking for a new ball.  At the moment he throws an ultimate inferno most of the time.  He said he is looking for a ball with similar hook, just more on the back end part of the lane.

He is a speed dominate player, low axis tilt, low side roll.
We bowl on older wood surfaces.  

any suggestions?

I'm not sure I understand your dilemma.  You work in a pro shop, and you're coming to an online forum looking for recommendations?

Speed dominant, low side roll, low tilt, and old wood lanes?  Good luck looking for a strong ball with more back end.  Red Zone with a slight scuff?
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Telling it like it is.