I just got through the match process and there are 4 programs where I interviewed that had at least a bit of the combined aspect. As previously posted, Cleveland Clinic is a through and through combined fellowship where the neurosurgery and ortho faculty were indistinguishable (other than that the neuro guys were the only ones doing the intradural surgeries). It is a solid program, a great name, lots of good tertiary exposure, lacking in trauma, and also gives the fellow the opportunity to operate out of a community hospital every now and then doing bread and butter spine. The other program is Texas Medical Center in Houston where you spend 2 months with a neurosurgeon at MD Anderson with the option of spending a 3rd at the end of the year if you want. It also has a well-rounded trauma, degenerative, and adult and pediatric deformity experience with a good mix of cervical, thoracic (as much as you would anywhere else I am guessing) and lumbar procedures. It is a solid program that tends to fly under the radar a bit. Other than that, UCLA had a bit of interaction with neurosurgeons, but the 2 main attendings are ortho trained. Finally, in Louisville the ortho spine surgeons work intimately with neurosurgeons on almost every case with the ortho guys doing the exposure and instrumentation and the neuro guys covering the decompression. There may be a chance to do more with the neuro guys for a motivated fellow if time allows.
I can't speak of the other programs that you listed, so I'm sorry, but I hope that this helps.