Piano accordion working or in need of repair. (New Costessey NR5)

I'm looking for an unwanted piano accordion. I'm interested in learning about repairing them. Even one in poor condition may be useful for spare parts. They are no longer popular instruments as the guitar has overtaken them in popularity and I suspect many have been played by peoples relations and then been left unused for years. Then they often need a lot of tender loving care and maintenance to be made playable again.
There are very few accordion repairers around these days so the poor old things just get left in cupboards. I feel they have a musical story to tellL
Can collect within a 50 mile radius of Norwich depending on what may turn up.
Thank you for looking at my post.
Kind regards