Is the V7 PS2 still the latest ver on the market?

[iruleyou1]

I want to go to the store today and buy a new ps2 so would like to make sure that the v5 v6 v7 no solder mod will work for it. The ps2 is not for myself so I do not want to go through the trouble of soldering one in.
If I order a nosolder mod now can I be sure that it will work in a ps2 I go to the store and buy new today? I want it for tomorrow so I am overnighting it.