If it is a studio style offering you want, look to computer switch mode power suppllies. I had a slew of 6V 4aa cell flashes I began my studio work woth. Lots of zip cord, but I powered them off of an old PC power supply. It was happy to deliver 20A at 5vDC, and recycled theflashes quite quickly. Faster that after alkalines recycle after bing used a few dozen times.

So an adjustable DC power supply set at 8V to source up to about about 10A would do fine. Scour you local electrincs wholesaler or turn to the web.