http://www.exmodelengines.com/cox-.09-parts/
http://www.mecoa.com/acc/glowplug/glowplug.htm The Mecoa plugs are listed as "coming soon". You might drop them an email to see if they have a delivery date.
http://www.mecoa.com/acc/adaptors/index.htm Mecoa does have an adapter head for the .09 that will accept a standard plug. These tend not to perform as well as the OEM head however.