Its a bit of a minefield, as the same geometry can be used on different models, but under different part numbers depending on application. The steering lock is a good example. Plunger frames only have the lock towards the end of production. The frame changes slightly with a plate for the lock operating plunger added to the steering head. So here a late type top yoke with a hole for the lock mount can be used on an early frame, but without a plate the lock is useless. The part number and forging change, but the geometry is the same.
Conversely top yokes with locks for Plunger and S/A Models look similar, but as they have different forging numbers and applications they can't be a simple swap in my estimation. The bottom yokes are distinctly different.
Have a look at the Draganfly online catalogue and take your pick.
Swarfy.