Boardwalk PCB by /u/Shensmobile
Quality is great, but it doesn't support my configuration, 2x 2u space bars in HHKB layout, so I needed to cut the foam to adopt it.
I honestly cannot express how impressed I am with the keyboard foam. It turned my boardwalk into a deep, thocky beautiful acoustic pleasure.
If you're on the fence just buy it, you won't regret it!
Boardwalk Plate Foam
Perfect fit! Really does the job and is better than others I have tried. Will be buying more for sure.