7t92-0bb0

I'm looking for advice on reattaching a hand that fell off one of the small dials on my Seiko chronograph. This dial simply fell off one day and was bouncing around inside the case. I have opened the watch, and have verified with a microscope that the pin on which the hand should set is still...

I have a Seiko 7T92-0BB0 with a crown that has broken off with a bit of the stem in it -- so I need to replace both the crown and stem. Can someone point me to where I can find a new crown and stem? I have had this watch for a while and really want to be able to fix it, but I'm new to watch...