Cherokee ammeter revisted

At the suggestion of several on this group I found the problem of a
swinging ammeter on my warrior to be the alternator switch. Now I need
a new switch. To get a new switch I need a part number, as always.
Now I need a suggestion for a vendor for both a part number manual and
a vendor for the alternator switch. Any favorites?

While we are at it - I haven't crawled under the panel to look the
situation over as yet but from the outside it looks like a real bitch
to get to. I would appreciate a few words of encouragement and perhaps
instruction from someone who has successfully replaced this switch on a
Warrior. Thanks and also thanks for past help. Leo