Power-blocks discontinued

So I've jsut got back into Fitness blender after having my little girl.

Just before I found out I was pregnant I Brought the U-33 Powerblocks stage 1 with the aim of being stage 2 in a few months time.

However I was banned from exercise throughout my pregnancy so didn't get around to it. Now i've found they've been discontinued. I'm soooo bummed.

Anybody know if there's anywhere in the UK that still sells the stage 2 add on or if any of the other stage 2s are compatible. My hubby is not too chuffed with me wanting to buy a new set :/