Tallfatnewbie,
This link might help:
https://www.bikeradar.com/forums/viewtopic.php?t=13075762
Elephant bike (ex-Royal Mail Pashley):
https://www.cycleofgood.com/elephant-bike/
Whether a suitable crank drive kit (Woosh) could be fitted to this, along with other mods (rear hub/gears?), other...