Installing Ikea Maximera drawer into another brand kitchen

With your plan c you would have to add 5cm to each side, that looks awful.

Yes, it would. Awful. At first you fiddle around, a board with an angle above, then the side rail on it, so the drawer is offset, meaning 10 cm free on the side, but these cabinets don’t have horizontal shelves inside to drill something onto.

Maybe a Nolte kitchen user will chime in here again with the cabinet inside dimensions of the 60 cm or the drawer width?!

60s cabinet interior is 56.5cm,

and buy a Nolte drawer from Geisler?

All the furniture manufacturers (except Ikea) usually use standard parts, e.g. from Hettich. Have you ever checked there?

Nolte has Hettich

Nolte has Hettich

Good to know!!

60cm carcass inside is 56.5cm,

and to buy a Nolte drawer from Geisler?

Exactly, that's what I intend. But they only have "from 2016" models, and if you say that the Nolte carcass inside is 56.5, then it has 5mm less than one from before 2016... then the cheap Ikea drawer would fit... however, Ultrusta is currently not available...
The 56.5 confuses me now: I have exactly 57... but maybe I just need to put my glasses on when measuring :D
I could just call there ;)

All the furniture manufacturers (except IKEA) usually use standard parts, e.g. from Hettich. Have you checked there?

I think I was there, on the site.
Could it be that you had to assemble everything yourself there?

Edit: No, I didn't know Hettich until now.

There are some shops on the internet that sell the drawers and pull-outs of well-known brands. For example, Lignoshop or Küchen geisler. There you will find them at a reasonable price.