classic motorcycle forum

Hi new to the group and always been interested in the old Brit bikes and been messing around with bikes now for 40 years, usually Japanese & Italian bikes, Recently in a deal of sorts I got a Villiers engine, it had been sitting in a leaky shed and had been exposed to the elements the engine numbers are 051D 1723 & Model 31C it will need a complete rebuild as the piston was missing, the bore is rusted and may be able to be rebored i need a carb too but when i went to http://villiersservices.co.uk/ i could not find the 31C parts i will need, Can anybody help me as I am a newB with Villiers ? Is the 31C known as anything else and what bikes was this engine from and the years it was produced all help will be greatly appreciated Thanx, Rick