The Cree diodes I listed are $0.43, so while not cheap, I would not consider them boutique. Maybe the demand was too small?
Even 10 ns trr is too long. The problem with trr and Qrr is that they are highly temperature dependent and difficult to match over temperature. Cds, while non-linear, hardly varies with temperature at all. Most (not all) data sheets do not even bother providing anything close to enough info on reverse recovery, anyways. The Cree diode was being used for a lab application, but also for a demo board. For the former (a desat detection circuit), the lack of Qrr makes it easy to compensate for diode characteristics. However, I already have on hand all I will need for at least one lifetime since it's a lab fixture.
The demo board cannot have any non-commercial parts, and I will probably just skip the diode because it is something of a bandaid. It just means extra work for me to figure out a workaround. Blueskull, I appreciate the offer, but I have access to experimental parts. Unfortunately, they are not viable for the demo board because any parts I use must be in commercial production, reasonably obtainable, and my budget for these demos is unlikely to increase.
I was really hoping I had missed something in my search for a replacement, but maybe it's just not going to happen anytime soon.
Thanks,
John