Townie 7D to 8i or 7i?

I would like to convert my Electra Townie 7D to an 8i or 7i (Internal hub)

Has anyone done this? Does anyone know an easy bolt on (hub+wheel) setup I can get off Amazon/Ebay?

I contacted Electra but they will not sell parts directly, they said I need to contact a reseller :mad:

Thanks in...