Peyotes are ready for repotting

I have been wanting to repot my peyotes for some time but the catcus potting sand have been sold out and not available currently. Found a bud this morning on one of them. I have previously succeeded in pollinating and harvesting and germinating seeds from cactus and succulents so this will be a project. I have added last year's photo to show how much they have grown in their current 5 and 6 inch pots over 12 months. Because they prefer very dry growing conditions, I don't water them regularly maybe once or twice per fortnight depending on the weather and they get their share of fertilisers when I feed my orchids.