Yep, the Duxford Beau is being built from bits of each. I think there are also different parts from different Marks even in the British bits! It's intersting that those exported to Portugal are also different internally. I've got some interior pics of one somewhere, I think the one that's in the RAF Museum, which is ex- Portugese. Fairly sure there was a wine rack next to the oxygen cylinder storage.......
BTW, just remembered. In the pics I posted of the Duxford Beau, there is a loop. or ring, shown on the outboard leg of the starboard undercarriage. This is a temporary locking pin, to prevent the gear from folding, and isn't a standard fit. Also, on the pics Alex posted, the red part of the gear legs serve a similar purpose, in preventing the oleos from compressing due to possible leakage with time - they are sleeves fitted between the oleo tube and the bottom of the leg, and aren't on operational aircraft in use.