Look under 'aircraft clocks' on ebay. The the wind up 8 day clocks are generally worth fixing. The electric ones are not. Generally, $100.00-150.00 to clean and lube. Parts are extra. Never,ever overwind the clocks........I've been sending my clocks to "The TickTock" clock shop in Colorado Springs, CO. They'll even make parts you can't buy. Either that or the shop in Grass Valley,CA. that Robert mentioned. Dan