Bearing in mind that the standard for "photographical purposes" on this thread is being able to buy it at B&H, it looks like you have a ways to go.
That aside, I'd like to see your project succeed. If, as you say, that evaluating light spectrums and profiling cameras is mostly futile. I think that I can manage building one. There are a lot of pieces in the project. I was planning on starting by experimenting with a Particle Photon to calibrate myself on managing this particular microcontroller.
I'm guessing that a lot of the rest of the project is in flux while Alexey finishes the COB project, correct?
The idea is to share what we know and thoroughly tested, to provide some help and reliable reference (schematics, PCB design, etc) to those who may need it; and of course to make it reasonably easy for DIY and not overly expensive (comparable or cheaper than the regular profiling setup). The method by itself is not a unique and a very logical one, it became a relative commonplace in 2009. Far from being the first, in 2006 I used off-the-shelf equipment (monochromator, integrating sphere, spectrometer, and light source) for this (because I can afford the expense). Resulting colour transforms were incorporated in RPP about the same time.
LEDs are the best solution that we found (for multiple reasons, including being DIY-friendly), but halogen lamps and xenon flashlamps in strobe mode were also tested to work well. As to COBs, we don't expect any surprises with the recent designs we tried, so it is mostly a matter of testing reliability now, and it takes time. One can come up with his own design, so I don't see how what we are doing in terms of light source design is holding things off for those who are comfortable with EE
B&H: they sell some of our software, I don't see why they wouldn't be interested in selling hardware for spectral profiling in some future. It may be based on this project, or on some other, including by a different team. If one needs to profile lens+camera combos, creating multiple profiles, he may be interested to have it available. But mostly it is about renting and service.