BRMC and Watsonian are the same.
That photo is the same bike as Blltrider posted the link to.
It's a Watsonian conversion kit, on a G5 UCE platform.
I think you can order the parts from Watsonian, to do it on a G5 here in the states, if you want to do that.
This stuff isn't inexpensive, but if you want it, then that's what it will take to get it.
All the good quality aftermarket parts cost a good bit, from any vendor.
But, you get nice product for your money.