Hmm, that land speeder chair could work. As for the diorama, it would include this character here:

I had thought of using this and converting it into a dental chair as well:

I wonder if that might be easier than finding an old land speeder.
These have a dental chair feel. Could customize em a bit.

That could potentially work, but its $33 for that set which is a tad too pricey for something I will cut up just to remove a piece.