You might try calling Glen Danuser at Danuser Machine Co. their website is here: Attachments | Augers | Post Diggers | OEM Parts | Recoil | Danuser. He's helped many other members with parts issues, as he is a member on here. He may see this thread later and chime in. Good luck!
You can call our distributor Wheat-Belt Industries at 1-800-644-6050. If you provide me with your serial number with your name and address to sales@danuser.com we will send you a free manual with safety decals.
Glenn Danuser
Danuser