Would be quite hard to find something like that here in Australia , have you tried at shotts ? Why don't you import them from America ? Cassie would deliver for you right to your door

I don't recall seeing it but there are hundreds on Temple and Webster.

Have you been into the closest timber supplier? Often they won’t have stock on their website, you have to go in and ask.

Hi, Mau, another option that we actually use is to purchase all the fittings and then make the ladder to the exact size you want. Try googling "Library Ladder Hardware" for a supplier close to you. It is also always good to get the type of wheel that locks when you stand on the ladder. Hope this helps, Malcolm.