Round Robin Plate Blocks

I have been slowly building a plate block collection. I use 8.5 x 11 C-line sheet protectors with photo corners to mount blocks. I use showguard mounts with any PBs that have high value.

My conundrum is I recently bought a large set of round robin plate blocks. I didn't consider the mounting. 8.5 x 11 is too small to effectively mount the plate blocks in a 2x2 arrangement.

Rare but I've seen a few round robin albums. There aren't any great options of C-line sheets that are slightly bigger. Any other ideas?

Many thanks from Denver.

crickets ... I optimistic someone is out there with an ingenuous solution.

I have mine sideways on 8.5 x 11 pages.

2x2 fits just fine until you get to the modern jumbo sizes, or the earlier flat plate PB6 where I have just two on a page.