I'm going to stick my neck out on a limb here. If you have 48 fields and they ALL can contain a given value that I infer comes from the same combo box, this table must contain what we call a repeating group. If this is true, the table is not normalized and therefore is causing you headaches.
If your table is as I think it is, you can't get there from here without doing a lot of things by hand. No automation will help you in this case.
If I have misread the situation, then I apologize that I did not understand your question. You might try to clarify your situation just a LITTLE bit more so we can see if I'm right in my inference.