Cat 304 CR Bucket Pin Damage

Just picked up a 2003 304CR, the pin that attaches the bucket to stick is shot, its not so loose where it attaches to the bucket but where it attaches to the stick is very wobbly, can anyone tell me the procedure to repair this, will a new pin kit suffice or do I need to get oversize pins etc ??

Also looking to put a hydraulic thumb on, can anyone tell me the best place to get one, it has the hydraulic lines but no hook up for the cylinder to attach.

Cat 304 CR Bucket Pin Damage