Help … card holders similar to SGC or PSA slabs? (Personal display only!)

[btryin]

I’ve been working on various displays for my collection, which consists mainly of SGC cards, but also some PSA and ungraded. One of my display arrangements is for a small collection of Allen & Ginter cards, one of which is ungraded. I would like to find a holder to put the ungraded card in so that the size of that particular card in its holder is similar to the other, graded cards next to it in the display.

I’ve been looking for an acrylic holder of some type that would be similar in size to PSA or SGC but haven’t been able to find anything. Does anyone know if such a product is available? Or, another thought, does anyone have used slabs that they’ve cracked that they would want to part with? Maybe those would work? I am NOT looking for slabs to create any kind of counterfeit thing, but simply to use for display of my collection.

(Yes, I could send the ungraded card in for grading, but I'd rather look for an alternative first, and I'll have the same issue for other cards at some point as well.)

Any input is appreciated!