Have you broken the Maxle itself or the hollow axle in the Hope hub?
If it's the Maxle itself what has broken? I snapped off half the 'tightening collar' (the bit with Maxle etched on) but can still tighten and loosen by using the one remaining half.
If it's actually the hollow axle in the Hope hub itself are you using a Maxle or a Maxle Lite (with the thin centre section)? The hollow axle is only ~1.5mm thick and the stepdown where it enters the freehub body is the obvious weakpoint. I snapped a 15 month old hollow axle 3 rides after switching to a Maxle Lite from the broken Maxle.
Matt