I've made my own stands for years... not sure what a breeze block is, but I usually use a concrete block (s) & common 2inch ( inch & a half finished size ) construction planks to support the weight, & then cover by screwing / nailing into the planks some sort of covering...
another option would be to have a custom steel one made ( I have buddy that is a fabricator, & very capable of making a steel stand that could be painted or powder coated )
my block & plank stands in my basement were made 20ish years ago... held full aquariums for 5-6 years, then sat empty, I refilled them this year, everything is as good as could be expected...
Here are a couple with pine, car siding, covering the blocks and planks, on the 2nd picture there are 2 - 55 gallon tanks back to back, because of the span, there is a single stack of 8" concrete blocks in the middle of each tank, under the plank... coincidentally this allows space under them, for another 55 gallon in the middle... the paneling covers the front, & the tank is exposed from the back side... that used to be my feeder fish holding tank, as I had a lot of predatory fish back then... 3rd picture is a stacked double tank stand, under construction this year, using a painted ornamental block, that will stay exposed I'll try to add a completed picture with a 45 gallon tall on top, & the 65 gallon ( pictured ) on the bottom...
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