I'm not surpised.
A pro lab that I use hasn't been able to get P-3 chemicals in the U.S. for the past 8 months. He was ordering them from a source in Europe to keep his Ilfochrome processor working.
The labs with LightJets have killed Ilfochrome. Between Fuji Crystal Archive and Kodak Metallic paper, there's no sales for Ilfochrome prints. The home darkroom market is so small as to be almost non-existent. It's a product that's way past it's time. There are so many problems with getting good prints from it - from having to make masks to the color crossover - that I have no qualms about seeing it go away. There are far, far better ways to make color prints from transparencies.
I can understand the company's decision. That's a lot of money to keep tied up in facilities to produce products for a very, very small market.
As to Ilfochromes being "collectible" just because they're Ilfochromes - I don't mean to puncture your illusion of rarity - but, it hasn't happened with dye transfer prints. It's the artist that matters, and NOT the printing media.