Particle dev kits - breadboard manufacturer?

Does anyone know who makes the breadboards which come with the Particle Dev Kits?

I have had my argon and xenons for ages after getting them on pre-order, but only really had a serious play in the last couple of weeks. Everything about them screams high quality. I have been impressed that even the breadboards are really nice to use.

I have generally picked up boards from eBay suppliers, some are good but more often than not, while they all look the same I generally find some holes are hard to get components in, some are a little slack. I’d love to get a few more, especially larger ones.