you might try buying a small fan first and just pointing it directly at the printer. that's what John Whitten did with all his hardware in Charlotte when he was running an ISP out of his non-air-conditioned bedroom.
I don't think that'd be enough, since the ambient temperature in the office is currently about 308K. It doesn't seem to be heat generated by the printer that's the problem, 'cause it manifests right from first powerup. So a fan would just be blowing more of the same-temperature air across it, not actually carrying any heat away. (It would, of course, help on days cool enough to be marginal, where the ambient temperature in the office was cool enough for the printer to work but the heat generated by the printer itself tipped the balance.)
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