Hi,
I'm from germany and here its still possible to get pcm-ram cards; I ordered one two weeks ago! The original cards from Korg are quite expensive, but there is another company named Waldorf where you can order compatible cards for nearly half the price. Unfortunately I don't have the adress of this company and I don't know wether they only sell to retailers but I'll try to get it and post it here. Maybe you find a store that'll order it from Germany.
On the backside of your T3 there should be a slot for pcm data. If this is so, you need to get a ram card someway. After this its possible to load and save pcm data from disk.
I also want to read (and maybe edit samples) T3 disks, but at the moment there seems to be no way.
Yours,
SiD