There is a "Roxette" version of the Roxanne thimble that is much less expensive. Perhaps you could purchase one of these to make sure it will work for you before going for the more expensive version. Check out the reviews on Amazon:
http://www.amazon.com/s/?ie=UTF8&key...fq9un797_e_p11
You might also want to check out the Thimble Lady's thimble selection:
http://www.thimblelady.com/faq/