Anyone taking this route from Canning Town here's a PDF showing the busses upto Upton Park: http://www.tfl.gov.uk/tfl/gettingaround/maps/buses/pdf/canningtown-2045.pdf (looks like stop F at Canning Town is well served).
It could be...you could get off the jubilee at Canning Town and walk it from there (not much difference between there and West Ham to the ground) and as a bonus you can jump on a 5 or 115 bus up Barking road if you see one coming. :thumbsup: