Hi Rideon,
a few issues I see axle is too high on the kingpins and axle diameter and length would be different so probably not able to use those, The $99 kits probably better value because you have nowhere to mount the handelbar brake lever so the rear type master cylinder could be mounted somehow. Lots of options I still think it would be easier to make yo the new stub axles to suit your king pins setup and that way you can set the stub axle at the right height to suit your wheels and mower deck height. Pity you are so far away
