I'm looking for creative ideas to attach the downhaul of a gennaker in front of my furler (see image below). I plan to use a ATN tacker above the pulpit and need a downhaul. My goal is to attach a turning block and lead it back to the cockpit through existing fair leads. Front is required because I'm hoisting on a spinnaker block which is forward of the jib furler.
My first thought was to use some kind of hardware to attach a block to the lowest part of the bow rail in front of the furler, but I'm not sure what hardware to use, nor what kind of a load this downhaul will create (and thus if its safe for the rail / fitting).
Any ideas from the nautical MacGuyver crowd? No gorilla tape solutions, please - I do have limits to creativity.