If it is the latter, then my suggestions are
Gronefeld: Decennium Tourbillion (10 pieces, but some still available). There are also some unworn parallax tourbillions on the secondary market.
Gruebel forsey: 3 models to choose from, ranging from the 24 second Tourbillion to the quadruple Tourbillion and double Tourbillion 30 degrees.
DeBethune: the kind of two Tourbillion comes to mind.
These are my 3 favorite independent brands, in that order.
L.U.Chopard has a few models as well.
Journe obviously has several Tourbillion’s in his catalogue
Good luck
Hussam