There is not a way to search for Donation Form by ID. However, you can essentially hack the ID (df_id=xxxx) of the URL of any Donation Form and refresh the page which will take you directly to the desired Form.

Steps:
  1. Click "Edit" on any Donation Form.
  2. Replace the unique Form ID (df_id=xxxx) with the numeric value of the Form desiring to resolve.
  3. Refresh the page.