You should be able to swap them over without too much effort. I installed a set of 10-14 mirrors on my 08 and all I had to do was oblong one or two of the mounting holes.
Don't think I've seen that done should look good, and didn't know you got a '12. Is it a replacement for the 08 or in addition? Your 08 was always one of my favorites, love the parnelli fascia