Well over a year ago, I wrote a fanfic that is a crossover between that wonderful novel, Good Omens, and Angel, the Series. Since it's fairly long (22,000+ words) I thought I'd just put the link here in case anyone is interested in reading. All thanks and all hails go to the wonderfulelgreyfor the edit and the magnificent ankh_lj for her hard work on the web site where it lives.
TITLE: City of Angels
FANDOMS: Good Omens & Angel the Series
MAIN CHARACTERS: Crowley, Aziraphale (Good Omens) Angel, Wesley
Wyndam-Pryce, Cordelia Chase (Angel the Series).
CATEGORY:Gen Hurt-Comfort Action Adventure
SUMMARY:When Crowley and Aziraphale visit Los Angeles, they
accidentally spring a trap that has been laid for them and find
themselves in need of the help of a certain vampire and his associates.