Are you sure one or both of the seat bases hasn't moved to widen the gap?
You could make a couple of 'legs' that you place under the table top to support it. The other option might be to make a wider ledge that the table sits on, but that might make the seats less usable when dining.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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