Hey dude, I was looking for some new pipes and came across a site with a lot of different footsteps and trays.... now the bad news is I can't find the site but it was all triumph. So keep looking If I find it again I'll let you know.
Edit; Have a look here... https://www.phillipmccallen.com/tri...ter-thunderbird-classic-rider-footboards.html Or here... https://www.triumphparts.nl/Webwinkel-Product-23518547/Classic-rider-footboard.html
World of Triumph have footboards for Speedmaster/America upto 2009. When you find some ensure they have the fitting kit with them. I'm happy to be proved wrong, but the 2 links above are 09/10 onwards and won't fit an 06. I made this (very expensive) mistake and now have a nearly new set of footboards that don't fit as well as a set that fit a treat.