"There isn't a team in the pitlane that wouldn't be interested in having Lewis drive for them, us included," team executive Brown told British newspapers.
He said it wouldn't even be a problem to revive the Hamilton-Fernando Alonso pairing that was so fiery in 2007.
"Fernando would have anyone as his teammate," Brown insisted.
Hamilton, however, would baulk at re-joining McLaren if the team's performance is not significantly better than it has been since 2015.
"If we are a second behind Red Bull, that will not look good, I agree.
"Perhaps we don't have the advantage of looking at as many car concepts as they can, but we do not believe we have any excuses or disadvantages."
And he said Renault is similarly confident heading into 2018.
"There are no alarm bells," said Brown. "They seem to be very confident and happy about where they are in terms of power and reliability."
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