I'd be interested in a few CDs. Most likely the 4550's which retail for ~$150.
FYI, the SEOS-12/15/18 were designed to match the exit angles of the B&C DE-250, Erich's DNA-360/350 and the BMS 4550. Of course all present designs are for the DE250 or DNA360. The 4550 is very high quality though.
To those considering the BMS coax compression drivers, they retail for ~$700 and require a 1.4", 1.5" or 2" horn throat. It also requires some sort of crossover, active or passive, between the high and mid.
I'm not sure there is a ton of value in trying to clone the Noesis given its $2100 price. Even if you can get the BMS coax at half of retail, you still need two high quality woofers ($750 for TD12X's let's say) and a XR1464 horn for $120. That is $1220 in parts alone. Add in the cost of crossover parts in a 3-way and a cabinet and you aren't far off of JTR's price. Yes, the TD12's are likely better woofers than what JTR uses (I don't know exactly what they use). You would also still need to design your own crossover which is hardly trivial.
There are other options for the BMS coax's though. One good option for guys with lots of space would be the horn from the JBL 4722. It is a 1.5" throat and would definitely take advantage of the BMS's ability to play down to 500hz. It is a better driver than what the 4722 comes with and far cheaper than JBL's upgraded drivers. You can get them from JBL parts for around $100. Same caveats though about designing a crossover. For a woofer, a single high quality pro 18 or 21" would work well. The BMS 18N862 would be a good choice especially if group buy prices are nicely discounted. A single in 170L tuned to ~30hz would be very nice. You could do a pair, but not needed. If I needed a pro 18" that could go full range and the price was nicely discounted the 18N862 would be one of my top choices (the other being the TD18H). I think they retail for around $500-600 but they are fairly new so prices are hard to find.
Another good horn option for the BMS coaxials are the Iwata horns from Poland. They aren't my preference, but many people like them and there are arguments for their use.