Angelo,
Your predicament is VERY common when people who have new BAs want one of the best motorcycle windshields available out there, at least in my book...Memphis Shades.
BUT...the idjuts on Beal Street, OR maybe it's next to Graceland...OR where ever the hell their headquarters are...HAVEN'T GOT A CLUE....THAT...the brackets for the Suzuki Marauder of a few years ago(either M.S. part# MEM9907 or MEM9974 I think it is, however I advise that you measure the circumference of the upper fork shrouds and then double check with them as to their dimensions)..FIT the Triumph America.
Don't give up. Eventually you may be able to talk to someone there who may have a little understanding that this has been the case since the BAs came out.
I know about this because I have a Memphis Shade Fats(once again, a very fine product), that I bought a few years back and after making my own brackets to fit it to my bike, found out this very fact, on this site.
Good Luck,
Dwight
