Hi Roger,
Last sunday we discussed about the Penny F. item. I've mentioned the german company that build replica's and other parts. Here is their link: http://www.historische-raeder.de/index.html
I hope this information is usefull. And of course PLEASE keep me informed about the progress en development of the "multi Highwheel/uni" construction!
Bye the way: www.rexbike.com (that was that Korean company building a "freewheel/drumbrake" hub in a modern replica of Penny Farthings).
Cheers, Rob (7447 Marathon Düsseldorf)