Oliver,
A bit of advice if you'll indulge me.
Alembic can always make you another one at a later date if needed. Don't feel as it is a huge loss, as hard as it is. I know you feel about your instruments as I do mine, but the truth is your situation, while painful, is most likely temporary (and I earnestly hope it is). If you have to part with one of your Spyders, you can always have one built later, or perhaps find one used. A new one would be more expensive given the price increases, but at least you'd have one.
If I were you I'd keep the Dragon's Wing. It's being custom made for you, and with your specifications. No other bass will be like it, and my view is that is what makes it special. However, I do, of course, defer to any decision you make in what must be a heart wrenching and difficult time for you. My heart goes out to you on this one. I know it would be difficult for me to part with any of my Alembics, but particularly the Spyder as it is/was the first brand-new Alembic I ever purchased. And we both know how they sound, play, and look.
In any event, I wish you the very best in this matter and hope that you are able to resolve it in such a way that you can keep both of your instruments. If not, I hope that this setback is only temporary and that you can set your finances straight and later acquire another Spyder.
Best regards,
Alan