I do not see anything, I do not follow your question or is it a statement? Only a few years ago when I went searching for new hoses for my Mistral, there were NO parts available for any double hose regulator. Upon contacting a mold fabricator and a company making hoses for SCABA equipment, the owner told me, "you are the third person in the last year who has contacted me" and I asked him, like, who, what and where I got put on to vss and then along came vdh. Where there is interest, if it is sufficient, there could be parts.
It is not rocket science to make molds and cast parts, I was starting down the road when I discovered there were already interested parties and preferring to save my thousands of dollars for other things than making molds, I decided to support the businesses who were already making progress and had made hard cash investments.
The point is, who knows what can happen if there is sufficient interest. And, I do not mean vdh necessarily, their plate is full as it is, nothing keeps another party form making the investment. Heck, maybe when I retire, who knows. I got a lot of projects, two airplanes to finish, a Jeep to finish (that is breaking my bank) and a host of other major undertakings and so little time and money to do everything.
As I understand, a few years ago, a group had a run of covers and tees made, I assume with SP. I bought several at that time. Maybe ask them what they see or saw.
N