Please can you tell me the model number of the Alto Kew Technology Pressure Washer. I need to replace the Pressure Lance but no one seems to able to help me find the right part due to the fact the model number is no where to be seen on the washer it's self. The only identifying marks or numbers are PA 66 GF 90 stamped on the Lance or Item 65 30421 Type P406 stamped on the machine base.