Ah now that is what is missing - a 100cm cage with a front opening door and narrow bar spacing! The nearest is the Savic Plaza - it may be that you're thinking of. It is quite tall, like the Alexander. In fact the dimensions are virtually the same as the Alexander, except it has a flat top.
Really it would need a full level for a dwarf hamster although maybe you could adapt the levels out of the Leon! Another option is to put cardboard round the inside bars and have very deep substrate which would effectively lower the height of the cage. It's out of stock at Pets at home. Amazon sell it but at a higher price - about £100. I'd say it depends on the personality of your dwarf hamster whether a 100cm or 80cm cage would work better.
https://www.petsathome.com/shop/en/p...r-and-rat-cage