I use Gridfinity Refined for bases and baseplates. 6x2mm magnets are either friction or snap fit. I do use a bit of hot melt when the snap fit isn't as snug as I'd like. There are a few Gridfinity pegboard mounted baseplates, but none were this particular style.

There is now. I've left the keyed openings on the outside of the baseplate, but I doubt they are functional. Made for the 1 inch pegboard of the US.