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These are my three Tamiya Hondas NSX that I currently own: the Tamiya Honda Raybrig NSX 2000, the Tamiya Honda Raybrig NSX 1998 Fia GT, and of course, the Tamiya Honda Avex Dome Mugen NSX 1997. Unfortunately, my Raybrig NSX 2000 headlights are missing. I tried contacting MCIRacing about it, but they asked about it and tried to provide some assistance, but they soon stopped responding to me. I’m considering trying to get the other NSXs: the Tamiya Honda Mobil 1 NSX, the Tamiya Honda Raybrig NSX 1999, and the Tamiya Honda Castrol NSX 1998. However, the Raybrig NSX 1999 and Mobil 1 NSX will definitely be the most challenging to obtain because they were both limited edition kits. The Castrol NSX, on the other hand, is not a limited edition, so I’ll try to get that one first.

Don't forget the Takata Dome NSX.

I was only focused on the Kits that Tamiya produced in the past. But I would definitely make the Takata Dome NSX if only there were decal replicas of it. By the way, which year are you referring to?

I used to have this model. The Tamiya Takata Dome is a 2008 NSX and was set 58424 .

Tamiya has made a LOT of NSX models over the years.  In just the Raybrig livery alone they have done 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2007, and the Concept GT (2015).  They've also done the Arta, Avex Dome, Castrol, Mobil 1, and Takata liveries.  Looks like you were mostly focused on the models from 2000 and older.

Those are all sick builds. I regret selling my NIP CF NSX body. The funds were well used though. 

I now have four of the old NSX kits! Two more kits are still needed (Which both of them are the Limited Edition kits). I recently acquired the Castrol Mugen NSX 1/10 scale model. I attempted to use replica decals from MCIRacing, but unfortunately, one of the sheets was too small for the body, resulting in an uneven appearance. As of now, I’m seeking any help from anyone who may have the original decals.

Very nice collection of NSX models!  Note that you can scale the decals from MCI by any percentage you like.  This might be an option if the ones you got are too small.  I suspect finding originals is going to be very difficult.