Thank you very much for caring enough to write a note back. Because it is "old technology" [I do not understand why Sharp doesn't realize we have no substitute for these units and it is an excellent niche market], Sharp cannot help out.
For any other "Sharpies" out there, here are 3 other sources I have since found that you might wish to try if you need parts, repairs, etc.
usedhandhelds.com [terrific guy!]
Thank you and please thank your wife again.