No doubt the bobbin bolts are rusted on, so a hacksaw is called for. The chassis bracket is a not very artistic piece of bent metal , and, will be d to suit.
You might find a slight rattle after re-fitting which I attribute to a slight misalignment at the flexible joint causing some contact. Calls for a bit more bending.
Bobbins are a proprietary part, these might do
https://www.manomano.co.uk/sanding-...8WXsvBtRXwHM7aY60-4r6b2kKyoaAuleEALw_wcB
