Last I knew, which was fairly recently, Mrmkl only had a couple left from parts he scrounged or leftovers from repair jobs. I did *not* have good luck using one of his boards in an A1000 though. Softkicked using 3.1 either. No go. AFAIK, Chiark is right and you need Kickstart (w/ IDE friendly scsi.device) in ROM. Not even sure if the hack that is piggybacking a Kickstart chip and soldering its leads directly to the 68000 would work. And then there is the fact that two leads get soldered to the motherboard from the CF68kIDE card that I believe at least one of the signals is either missing or not readily available on the A1000. A500, they're both next to the expansion port, which made it a snap to install.
In any event, I had much better luck wiring up a 2091 card to the A1000's expansion port than monkeying around trying to fit Mrmkl's board in an A1000. Compact Flash port gets in the way of the internal drive too, but not a big deal if you don't mind cutting one of the sides of its bracket off.
And last I checked on Amibay, he was working on a more friendly A1000 solution, so might want to ask and see about that though for sure...