Where can I find wicks, wick changing instructions and other replaceable parts, along with the year of manufacture for a KeroSun Sunstream heater H393823, lot # D09136B.

Have you checked the manufacturer's site at Portable Heaters - Replacement Wicks (http://www.kerosun.com/products/Wicks.mv) ?

The list apparently recommends wick part number 20451813 for the SUNSTREAM models. You may need a PDF reader to view the wick installation instructions available from the site.

Is it possible to still purchase a Sunstream heater,if so, where?
Or a mosel comparable to the Sunstream?