are you near a wells fargo branch? if so, a banker may be able to endorse the check for you.
An AVP or higher should have the power to endorse the check. A branch manager would certainly be able to do this and possibly a banker or two in the branch.
But the OP doesn't have the check anymore.
ETA: Now that I'm thinking this through, if the check is made to a specific line of business in the bank (ie "Wells Fargo Retail Mortgage" or something like this), this might not work.
This post was edited on 10/11 at 7:35 pm