Yes, we carry a couple hoses that would work as an extension hose for the model AR630-HOT. The model #'s are PW1021, EXT102F1, and 30.0130. These are all 1/4" high pressure hoses that could be used with your pressure washer as an extension hose. You would need to purchase adapter part# D10040 if you went with the MTM Hydro hose model 30.0130.
Let me know if you have any further questions.