A power-assisted manual wheelchair (YO31, Heworth, York)

Good evening,
I am looking for a power-assisted manual wheelchair to help my parents transporting my grannie.
I am looking at something like the image with basically no stirring control but just power assist for pushing.
I would also be happy with external add-ons to attach to a manual chair.
I will be happy to come and collect.
Thank you.
Can you help with this request?
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