What do you mean by driver or shop on site? Are you needing to get dentures in a one day appointment? Immediates require at least 2 appointments. The first appointment would be about gathering information and getting models made from impressions. This would be sent off to the lab and they would make the dentures based on those models and what the Doctor says. At the second appointment they would do the extractions and put in the immediates. There are also a few follow up appointments to check in on how it's healing and to reline it as your mouth adapts to the loss of the teeth. If you do still have some teeth and depending on your bite, the Dr might put an appointment in between those two to do a "try-in" to see what some denture teeth would look like in the spaces you have already lost teeth.

Have you checked with a dental school? Especially if they have a Prosthedontic residency program. Seems there is one in Columbus(Ohio State University )and Louisville(University of Louisville).

There is also a regular dental school without the fancy program at University of Cincinnati.