The Alaska has 1cm bar spacing too
A duna multy or maxi duna multy might be good. If you want a barred cage, there aren't many with narrow bar spacing. The Barney and Alexander have 7mm (mostly - except for the odd corner). The Savic Mickey 2XL is the same as the Hamster Heaven but with 7mm bar spacing (except for two bars where the door curves!) but that's expensive to buy.