Depending on how good the original copy is you could try using OCR software to convert scanned copies of the papers into text and save that way. We do this in our office with good results if the original copy is clear. A trick that we've tried is zooming the scan before converting. This reduces the number of recognition errors in the text. Should get you well inside the 5 Mb limit especially if you put compressed files up for download.
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Through difficulties to the cinema