Tools

I recently got a deal on a never used power broom attachment for an interchangeable trimmer tool system. Problem is, it's Husqvarna and has a (to me) unusual hex drive shaft while all the power heads I own have square shaft drives. The outer shafts are the same size and should work if I can adapt the drive shaft coupler. Before I start planning to make my own adapter does anyone know of off the shelf adapters for this purpose? Seems like there's a market for adapting different systems.