yep, that's them.
If you ONLY want to raise the pads, that kit you linked *should* work. (The only issue might be that the mistrals base bars curves into a "tear" shape a bit more than 3T's other bars, so it might not sit flush.) You'll also need different bolts than those supplied with the kit (although that's easily solved with a trip to home depot/lowes) since the mistrals pads bolt directly into the base bar.
I think the person you spoke to at 3T (as well as me at first) were assuming you wanted to raise the extensions and the pads. To do that you'd need the conversion kit (part # 30006, MISTRAL combo clamp conversion kit) which makes it mount similarly to a Brezza/Aura/etc. Here's a picture of the kit installed on one of Zabriskie's old Felts. I haven't seen one floating around in years though.
TL;DR the link you posted should allow you to raise ONLY the pads, so long as you have the right bolts.