Closed System Repost Update

I just received an email from s21x latex this morning letting me know that the system in his video was made by Rubberfusion in the UK. However he hasn't had contact with them for quite awhile and it appears they no longer have custom breathing systems advertised on their site, though they carry Studiogum equipment so I'm sure they can still put stuff together.

Does anyone know of any companies/individuals in the U.S. or Canada that are making similar respirator and rebreather systems? I'd prefer to find something non-eBay, though if someone can suggest some reputable store, I'd be willing to investigate. It would seem to me that a completed system would be cheaper than buying all the parts for it individually...