I have had a "coming together" of door mirrors (O/S right) with another Transit, the result was a snapped off arm and smashed up plastic. I have just got the remains off, the bl88dy thing was held on with two shear and one ordinary bolts. I had to cut the plastic off and use my little chisel to remove the two sheared bolts.
So, if anyone has a Long Arm, electric, o/s right non heated genuine Ford mirror for a 2007 MK7 Transit 350 the I am in the market .
Geoff