http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/directx9_c/directx/graphics/programmingguide/AdvancedTopics/xfiles/ConvertingExporting/conv3ds/produce3dsfiles.asp
Many exporting features...cheers,Paul June A. Domag
BTW: We have a list of exporters on www.ircomm.net that might help, but most of them you will have to pay for.
Mykrewww.ircomm.net - Managed DirectX Game Programming