Fallout Encyclopaedia user senpay has created a script that allows exporting of Van Buren G3D files into 3D Studio Max. Our own Continuum is currently working overtime to see what's usable with or without some tweaking to import straight into Fallout 2. These could potentially be used in Fallout 3 modding as well. How many assets can be taken from Van Buren is unclear, but Dude101 puts it at "potentially 500 + with some work". Some samples:
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Link: Original script post on Fallout Encyclopaedia.
Link: Thread on NMA.
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Link: Original script post on Fallout Encyclopaedia.
Link: Thread on NMA.