LR,
Welcome to the RBF bboard. I don't have a specific answer for you related to whether there are others with both scleroderma and diabetes, but, as diabetes is also recognized as a type of so called “auto immune” disease, I do know of some people who are treating their diabetes with an antibiotic protocol (AP). While your list of meds doesn't indicate that you are currently on an antibiotic treatment, I hope you are here to consider treating your scleroderma with AP.
There are lots of folks here either getting better or already fully recovered from advancing systemic scleroderma. Ask Richie, he'll tell you, AP works for scleroderma. Ask Lynne G. she can tell you too!
Again, welcome, please feel free to ask any question you might have. If you haven't already done so, read the book, Scleroderma, The Proven Therapy That Can Save Your Life, by Henry Scammell.
Cheryl Ferguson