A1200 motherboards suffer from a reset problem with the PCMCIA slot. I'm not sure exactly when this occurs, but I think that it does when you use a PCMCIA card (like an ethernet card for example) and as soon as you reboot the system it won't be detectable anymore unless a hardware fix is applied. There is also a software solution which works with your Blizzard card. ;-) It could be the other way around. PCMCIA cards only available at first boot and after you reset, not anymore. Anyway, not a big deal if you don't plan to use it and I suspect you won't as you plan to use a Mediator as you've mentioned earlier, which gives you an option of cheap PCI Ethernet card.
It is absolutely unknown of which board revisions/make these Vesalia A1200 motherboards are. I suspect 1D1 as SoftwareHut sell these and I know that they stock up through Vesalia, so there is a high probability.
Vesalia will take PayPal payments in Euros. If you order and get a paypal invoice that means that they have your order in stock. They will surely elaborate on what is available and what is not if a particular item of your order is missing. Basically if you place an order they will likely respond to your order related e-mails from that point. You will know that your items are available by getting a PayPal invoice. It's very bad customer treatment but those are the breaks nowadays with Amiga dealers. We simply have to take that s*it from time to time as we are limited with options. :-(
As for the floppy, I suggest a high density drive for A1200T or A4000 (they are the same product). SoftHut has them and possibly Vesalia too.