Wow…. what outdated thinking. So many of us have IBS, gastoparesis, etc that stomach issues are a very common result of EDS. EDS affects collagen, not just joints. That is why EDS affects the whole body.
As for finding a new doc, call and ask new offices if the dr is familiar with EDS and how if affects gastro issues. They might have to ask the dr and call you back.
There was a gastro dr, can’t remember who, who started using the Beighton criteria on his IBS patients, and found a HUGE percentage of them scored highly and had EDS when further screened.