I'm constructing a tall narrow pull-out cabinet using the IKEA Utrusta pull-out wall rack for cleaning supplies. The cabinet will be too narrow for the larger baskets, but they seem very sturdy so I am wondering if

1) The baskets will fit in other brands of closet uprights (standards), such as Closet Maid or the Container Store?

2) I can buy extra standards from IKEA?

I've the plywood all cut to size and the pocket holes drilled, the next step is to add the hardware and put it together!