Wanted: Lakefield mark2 bolt

Hi there. My 12 year old daughter just passed the firearms safety course and I’d like to get an old Lakefield mark 2 rifle that has been passed down to her, fixed up and working properly. Right now it misfires quite often so I was thinking if I can find another Lakefield mark 2 bolt, I’d switch it out and see if that makes a difference. 

let me know if you can help. 

thanks.