Hi Vallie!
I just bought a 1970 Hagstrom 12- string acoustic. So in my endeavours to find out more about it and the year it was made, I came across this website:
http://www.albinhagstrom.se/spare_parts.htm. There is a email contact there that you can email. Maybe they can help you with parts?
And post some pics of your guitar dude! ?
D