Choke toggle switch cover ?

I've been trying to find a rubber toggle switch cover for my 703 shift box, I've tried a couple but they have the wrong threads. Are these available from Yamaha or doe's anybody know somewhere else to get them??
Thanks for any help
Bajafishnut

[boats.net]

No Yamaha doesn't list just the boot, only the complete switch 6K1-82574-00-00 including boot.
http://www.boats.net/parts/search/Ya...03)/parts.html

I guess I'm going to have to figure out what thread it is, I think its 12mm X 1.0 but I'm not sure.
thanks for the help.
bajafishnut