Time is running out for West Marin residents who want government funding to replace their woodstoves: the Bay Area Air Quality Management District has almost run out of cash for the $3 million rebate program it kicked off in August, according to Kellen Dammann, the sustainability marketing and outreach specialist for the Community Development Agency. So far, the program has funded 27 projects in the San Geronimo Valley, an area the air district has deemed…