Super Sunfish traveler bar suction cup workaround

I am brand new to sailing. My dad came across a free sunfish which everything except rudder, centerboard, and tiller and gave it to me. I am making the centerboard and rudder from African mahogany and then the tiller from ash for only about $80. I needed to replace a few other small pieces of hardware and spend the next many evenings cleaning, polishing, repairing, installing, and enjoying the process.

After scouring the internet, I was unable to locate any suction cup ends or ideas how to...

Super Sunfish traveler bar suction cup workaround