If you really mean the belt's length is 1065mm, I reckon that this implies a wheel to wheel centre of about 500mm, with the wheels being about 20 mm diam.- ball park figures onlt – too idle to work it out exactly. With a length of this order, it would seem to be too big for a handheld device.
Whoops, looked up belt sanders on ebay, found this :- http://www.dynabrade.com/pdf/lit/D98.16.pdf
Its a 762mm belted "Dynabrade" with an extender option to use your length belts. I wonder how much it costs?
Frank