|Hello and welcome. I'm not aware of any factory or aftermarket OSHA cages available for the Vortalex. Emerson fans had an accessory OSHA cages for some of their older fans. Check Chad Baker's antiquefanparts.com site. He used to have one of the Emerson ones for sale there.
They used to make net-like coverings that would go over non OSHA cages to keep fingers out, but not sure if they're still made. They look ugly, but are effective. Maybe you'll have luck with that route.
By the way, we'll be hosting a regional meet in Downingtown, PA not far from you in mid September. Great place to see cool fans and meet some nice folks! Hopefully you can make it. Details are posted on our events calendar here on this site.