Yes, that trade-in program was only available from August 15th to October 1st last year:
You could try to pre-order one WITHOUT an amp card from Japan and they might be able tp start shipping in early June
Add 10,000 yen for the standard amp card
Just bear in mind that might be worth waiting for more reviews of AK100 with different mods IMHO. Keep an eye on AnakChan's review of MS-AK100 in the near future. I'm quite interested to read that even though I've got Tera-Player already.