If you have problems with getting work or volunteer references, try getting personal references. A friend would do, or a school teacher or college lecturer.
I'm afraid I don't have experience with volunteer organisations requiring referees before accepting so I can't offer much more; all the volunteer jobs I've done didn't have this requirement.
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Said the apple to the orange,
"Oh, I wanted you to come
Close to me and
Kiss me to the core."
Think you're ASD? Get thee to a professional!