creator:R~U8
That is the creator code, found here: http://www.leisterpro.com/doc/version8/questions/answers/upgradeproblems.php
If that does not work, maybe a third party app that can search for
creator codes would help, I don't know of any
From the Finder, Chose Find from the File menu.
Using the Kind popup, change it to custom:
From the custom dialog, search for Raw, choose Raw Query
in the raw query edit box, enter:
(kMDItemFSCreatorCode == "R~U8")
Make sure you search the entire Mac, and it *should* search the
external if the spotlight index is correct.
IF your document is still not found, try searching for:
(kMDItemFSTypeCode == "R~D8")
*if* that still doesn't work, try changing the 8's in those searches
to whatever version you think you created/edited the file with (7, 6, 5)