Unfortunately, there are no easy ways to help with the mast rigging on the Getaway. The mast stepping systems you see in catalogs such as Murray or Hobie's are designed for mast that can be raised without being on their side.
Because of the shape of the mast base, the Getaway mast must be positioned sideways when it is being raised. This means you can't use the headstay to pull the mast up, as it would rotate the mast from its sideways position.
I've been pondering the issue for quite a while, and I'm now considering replacing the two upper rivets from the mast tang (where the top of the headstay and the side stays are attached) with a long eye bolt (with the eye on the side that faces forward when the mast goes up). I need to make sure that this modification would not damage the comp tip (maybe Hobie can comment on this if they see this post), and keep it watertight so that the mast doesn't fill up when going over.
I should then be able to use something like the EZ Step Mast Raiser. I've already added two small eye straps on each of the wing support to rig side stays for the gin pole and prevent the sideways motion of the mast. It might take me a while to get the gumption to drill through the comptip, but I'll let you know when I get the setup debugged.