bill.dont know if l will be of any help to you but you never know obviously buma,s is no longer there the old man died a true engineer passing on to his son without being rude he knew absolutely zero about engineering quickly sold place first chance he got to a large well known supermarket chain and a large superstore is now there so spare parts will be difficult to get but at least you have an edge, me l know the then works manager was allowed to take the blueprints of buma borer and he does or did supply spares and l have his phone number at worste he might give you a drawing of the part you are after-onecut