All parts came from a Fabia with factory rear windows, just had to wait till one was being broke and was in good condition (door cards), no matching of revision V my front parts.
Regarding using Polo parts, VAG has the ability to make cross platform parts look identical, but there is often just a letter different in the part number and in all honesty I cannot say whether or not they would work............I suspect they probably would BUT the pin outs maybe different on the motors so then your messing with the wiring looms to, would need to check that..........but offcourse the plugs could be de then re-pinned to suit, depends on your ability and access to Polo wiring diagrams.
If Polo parts are cheaper or easier to source, you "could" get one and try it, then if successful, get another or re-sell if not, I doubt you would lose much money if any.