Wheelchair Moters jazzy 1121

[normad]

Hi all, I am trying to find out if I could get some (2) 4 brush motors for my Jazzy 1121 as a direct replacement so that I can bolt them to the existing gearboxes. I am looking for this as I could do with a bit more power, as I have to use a footbridge over a railway track an it sometimes is a struggle to get up it. I do not need them so that I can go faster as my wife can not walk any faster, I would like to find them in the UK as the only place I can seem to get motors is in the USA and the shipping is high or if any one out there knows a way of getting that bit more power from the chair could you please let me know
thanking you all
Norman