Help me find the perfect ladies commuter frame

[cram]

How hard can it be?

Looking for frame to build a ladies comfort/commuter. What I need in a frame:
- step through
- at least front suspension (and rear if possible),
- internal hub gears (nuvinci 380) without chain tensioner (i.e. sliding/horizontal drop-outs)
- 700c wheel spacing.
- front and rear disc brakes.

Will also become electric with a mid mount kit.

She is currently riding a Reisse and Muller e-bike but it is a large and she could use a small. And she wants to go faster than the Bosch allows (yes I know I can mod the Bosch - may still go down that route)...

[find_bruce]

Not possible to have both rear suspension & no chain tensioner - no suspension has a perfect arc around the bottom bracket

[Velt]

Why do you want front suspension? She might feel faster on one without

[Thoglette]

- at least front suspension (and rear if possible),

Brooks B67S That's a sprung saddle. And add some fatter tyres.

- 700c wheel spacing.

What exactly do you mean? I'm presuming 700C with 135 rear and 100 front drop out spacing
Why do you need 700C? Especially as you need a small frame (and fat tyres). Mix these with 700C wheels and you end up with a badly compromised geometry.

How hard can it be?

Well, you didn't specify carbon or titanium

Seriously, you are asking for a fair bit. Probably the closest I can think of is a Rivendell Clem-L with a new (disc) front fork. (There are adapters to mount discs on the rear of non-disc frames if you must)

Maybe the best move would be to modify an existing e-bike, like the EARTH ui-5 or e-bikes ui-ryder, which tick most of your boxes ???