Yes, they do look much like the handguards on the Tactical and I suspect that they are.
As far as fit, I did try fitting the upper guard on my CZ vz and the fit is perfect. I would expect that they would fit perfectly on that receiver. What will matter most is how they fit on the future (distant future???) kit receiver.
I am glad your mag plates arrived before you had to write a nasty letter. I wasn't too pleased about having to send a "not-so-pleasant" e-mail, but I was close to sending an over-the-top angry e-mail. Fortunately, I didn't have to resort to that. Funny thing the "middleman" situation. They never suggested anything like that to me, but kept telling me "We'll send them next week." After hearing that three weeks in a row over the phone (with an ignored e-mail in there as well) I was a bit torqued and nearly sent an angry e-mail, but I backed off and just sent an unpleasant one. It appears that it worked so I am glad I didn't have to resort to a mean and nasty e-mail.
The "middleman" situation would explain a lot, but they told me that my order kept "slipping through the cracks." At any rate, they are exactly what I wanted and I am glad TGI came through. Now I can move on and find something new to get really irritated about!