Leveraging CustomField descriptions

Is there anyone who has created an unpublished extension to leverage the description field of a CustomField value?

My specific issue is that I want a Custom Field that the user can select (in this case a list of departments), and then use the description (the email address of the departmental contact) to set the requestor value of the ticket. The department list should be relatively static, but the email of the departmental contact may change, and may not be known to the person filling out the form.

Is there anything to do this, or another way to link the values (relatively simple, this is a high-visibility project that needs to be done quickly)?

Kenneth Cummins
Application Development and Support

Health Care Information Systems
University of Iowa Hospitals and Clinics
1000BT
Iowa City, IA 52242
319.353.7719
mailto:Kenneth-Cummins@uiowa.edu
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Notice: This UI Health Care e-mail (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, distribution, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, then delete it. Thank you.