That's rough, it's a great camera, and they're usually very reliable.
I suppose you may want to look into equipment rental. However, usually it's the higher-end canon and nikon gear that are available for rental, which tend to be heavy, while I'm assuming you got the E-410 for the size and weight advantage it offered.
Have you tried calling Oly service in your area and explaining your situation? They've been known to give loaner cameras to customers stuck in tight situations with a piece of defective gear.