Coming up for me online that they used them in snapper mowers.
The briggs part number is no longer available through briggs australia but this mob in the USA are listing them. You have probably already explored this avenue but I figure I might as well post anyway
Courtesy of the F**$wits at microsoft, since last nights 'update' I have no ability to copy and paste (or vary my speakers volume) until they get off their lazy ass and release a patch.