Bill, This site has very good coverage of the divisional signs and has FHH in the "runes" section.
Thanks for the link. Great site!
Unfortunately, they are showing the same red colored wolf-rune graphic that I have seen elsewhere. Both Alfonso Sánchez's book "Feldherrnhalle: Forgotten Elite" and the book "MCS-010 The Sturm of Budapest. Elite forces of a Reich book" both list the symbol as being a yellow wolf-rune set on a black shield.