Bama Axis, we use the Newt Juice Gusher Flusher in our service department and carry them in our store. They handle the constant abuse our service team puts on them and they hold up really well. The handle is extendable and works with the Axis boats and everything else we have come through our shop.
We sell them for $47 but they are worth it.
http://newtproducts.com/pdf/gusher_tag.pdfAs for the plunger method, all you would need to do is cut a hole in the plunger and get some hose flanges/quick connects.