I haven't, but they look similar to a set of customized bars that a Rocket owner in Oz had on his bike...he's selling his due to health problems I believe.
They do look pretty good...the ones from Thunderbike.
I think the short answer is no. Someone either here or on the other site tried and as I recall couldn't get them to work. The mounting is different than the Standard/Classic models.
Have you emailed the Thunderbike guys and asked them? Perhaps they're working on modifications to the bars to make them work for the R3T.
yes I emailed Thunderbike parts yesterday but was hoping to get an answer beforehand..no patience you know!!..will let the group know what I find out..thanks for the suggestion and reply