I bought a Maxtra Heavy Duty Portable Tiller Cultivator from direct_power on e bay 2 years ago. The oil seal on the shaft of the rotors went good style. I looked all over the net for parts, but to no avail. I contact direct_power on e bay messages and they (Melissa) responded with 24 hours. I had to send them details and photos of the damaged seal. I then had to pay £22 for postage and handling and they sent me a brand new COMPLETE ROTOR GEARBOX which was delivered within 3 days. (The £22 was incredibly cheap as the gearbox is quite heavy.)
It is very satisfying to receive such customer service and the fact I was able to get parts when I was unable to find any on the internet.