I need a jpeg recreated as a vector file so it can be printed at a large scale

Design details: I have a jpeg stock image of a fields and sky background that we use for email footers etc. I have a big brand event coming up and I urgently need to get this printed on a large scale, around 6m wide x 2.8m high. I need this recreated as a vector file as I can't get the jpeg big enough.
Ideas for the visual style: exact copy of the jpeg
Where the design will be used: printed on a large-format screen
Extra notes: I attach our email signature so the detail can be seen. I need this job turned around within 24 hours of issuing the jpeg.