BROKEN TABS ON SEAT COVER

Four of the tabs which hold the cover to the frame have come away from the stud.
Its an original cover with well worn/rusty studs so does anyone know a way of fixing them.
Other option is to buy a kit. ( new looking studs ). Are these easy to fit ( no special tool required)?
Its an original cover with well worn/rusty studs so does anyone know a way of fixing them.
Other option is to buy a kit. ( new looking studs ). Are these easy to fit ( no special tool required)?