Bongo rear wheel arch repair panels... Transit or Sprinter?

[chizzel89]

I'm doing a bongo up as a project. It is high spec and low mileage, but has very extensive rot around the passenger side rear wheel arch and sill end. The drivers side is considerably better and certainly repairable without hacking the whole lot out, though the sill has rotted this side fairly badly. Also the rear panel behind the bumper is fairly shot.
I'm handy with a MIG welder and various grinders and cutters (recipro saws etc) and have a two post car lift, so I don't see why I can't sort the bodywork out and sell the vehicle on.

The question is which rear arch repair panel to go for the too-far-gone passenger rear arch?

I don't like the idea of fitting a flared arch like the Transit one as the stick on silver wheel arch trims wont go back on. And those might cover up my less than ideal paint skills... The sprinter ones are ofcourse not flared I think.

Do the Sprinter arches fit as well in other respects as the Transit arches? Which Sprinter are the correct arches for specifically?

Thanks in advance