spare parts needed anyone help

[Adam]

Hi I trying to source some spare parts for my ever growing watch collection.

I will first apologize if I am in the wrong area.

seiko calculator c359-5010E(gold)
1 missing button and battery cover. This watch is as new and really should be saved

a638-5020 A0 sports 100
crystal and button.

Citizen calculator watch 49-9714 sf-8-u
Crystal

quite happy to pay

any help greatly appreciated

also can anyone point me in the direction of a good tutorial on crystal polishing.

many thanks

ummedia