The Big Shot Pro has a 12 x 12 platform, but the machine is huge. I don’t have any place for it. You can’t just pick the thing up & carry it around place to place. It’s expensive too.

This reply is kind of late, but the Gemini that was just on the 24hr craft show has a 9 ” x 12 1/2 ‘  platform.  hopefully you got to see it.  This is the widest opening I have seen.  I have several die cutting/ embossing machines but wanted this because of its size and that its electric.

 I’m guessing the size you are talking about would be 8 1/2 x 11 inches?

I have the Spellbinders Grand Caliber machine – the plates are about 8 1/4 x 12 inches. I don’t see it on this site but they do have the new Spellbinders Platinum machine. It shows large plates that are 8 1/2 x 12 1/4 inches.

I also found the Sizzix Big Kick machine on this site but it does not list the size of the plates.

As for the key embossing folder – I think I saw something like this in a big box store but the folder was probably the standard embossing folder size – not as large as the folder you mention. I would imagine you could find something like that online though.

I hope this helps!

Sorry, I wish I could help.