If you have your heart set on a barred cage though and can afford a bit more - then this one seems to be a new/recent option! It's the right size and the bar spacing is about 1cm (3/8 inch) which is fine.
https://www.amazon.com/Prevue-Pet-Pr...VT3CDSZ8E4KH8P
There's also the Hamster Heaven which is a very good cage if you take all the tubes and penthouse out (it comes with caps to block off the tubes) and just leave the solid shelf in - then there's room for a Syrian sized wheel, a proper house etc. But it is over $100. Personally I think the Prevue pets cage linked above looks like a good buy and no diy - big enough but not massive.
This is the Hamster Heaven
https://www.amazon.com/Lixit-Animal-...VT3CDSZ8E4KH8P
The other 2 cages I know - Marchioro Goran 82 and Marchioro Kevin - seem impossible to find. Petmountain used to be the cheapest place but both they and Amazon have no stock. They may have been discontinued.
The other one on Amazon is the Lixit Mickey 2XL - this is identical to the Hamster Heaven except it has narrow bar spacing (7mm) so suitable for any species of hamster and doesn't have all the tubes and plastic stuff (which is a good thing!) but it usually costs even more than the Hamster Heaven.
However if you're thinking of having hamsters for a long time, or different species in the future, it's a good investment as it's a cage that will last a long time and be suitable for any species. The Prevue cage is a better size for a Syrian though. A little on the tall side but if you fill the base with substrate it'll reduce any fall risks from the top - cushions them.
Actually the Lixit Mickey 2XL is cheaper than the Hamster Heaven at the moment! Out of the two I think it's the better cage due to the narrow bar spacing and no holes for tubes. The metal grid shelf needs to come out though and the tubes too (they are mouse sized - our syrian got stuck in them).
https://www.amazon.com/Lixit-Animal-...xit+mickey+2xl
I'd go for the Prevue cage - it has pretty good reviews, costs $68 dollars and no diy