Webasto marine heaters and heat kits can be purchased online at Sure Marine Service and West Marine, as of 2015. Webasto cabin heaters for trucks and cars can be purchased on the DHGate website.
Sure Marine Service offers the Webasto DBW2010 12-volt hydronic marine heater for sailboats and powerboats. It also has multiple models of the Webasto Air Top forced-air heaters. All heaters come with instillation manuals and wiring kits.
West Marine sells the Webasto Air Top Evo 24-volt cabin heater, as well as many 12-volt models, and offers free shipping for Internet purchases that are shipped to any West Marine store. DHGate sells Webasto 12-volt heaters for use in cars and trucks.