Had others suggest another option for the solid ring is google FRX rings for vendors and sizing. I researched the blocks before sourcing the Marstro...

Finally tracked them down at surfcitycatamaran.com (nacra dealer)

I think you may be looking a couple pages lower at the non racing package setup. I mean this: This is like the marstrom hoop and double block (I t...

Thanks for the suggestions! Dave