"unexpensive" dome ports

As long as I consider that the prices for the dome ports are out of control and I have a lot of ideas I have been doing my own dome ports. So I have developed a system in which I can manufacture 4" dome ports for almost all brands of housings with (and this is very important for me) with interchangable by the user plastic fronts in seconds. So with only one body you can put different domes (sometimes you need the dome to be more or less curve, or yo can convert it into a flat port for macro). The plastic is not specially treated for photography but I can't see any difference on the results with a Canon 5D mKII and a Canon 8-15 lens.

I've been diving with it for a couple of years, in deep dives, trips to the red sea, Indonesia, Canarian Islands. The system works, its easy to use and and easy to produce. My question is, do you think it would be a good business ? would you buy it ?