Ezra - See Ezra's HOG - might be a good solution for you. But if that doesn't work for you, there are reflectors that will throw a rectangular pattern. PL's are nice and have some super reflective aluminum. Pretty impressive. Jorge, from Hight Times, did a write up on different reflectors a few years back. PL's came out on top for having even distribution. Check out a few online grow shops. I forget who I saw selling just the PL reflectors.
I wouldnt use a light mover.Is this for veg or flower or both?The deeper the reflector,the more it tends to concentrate the light more straight downward,shallow refectors tend to disperse the light to a wider area.I like deep for veg and shallow for flower when the plants are more spread out