They did the same thing to me... that's why I had to call them, because I had discounts riding on that order which wouldn't transfer for a new one. If you had discounts on your order, I'd call them to get that rectified. If not, go ahead and order the Vanilla anew.
As to the packer itself, if you intend to try out latex and nipple style STP device (or any form of soft/flexible tubing at all at some point) you should go for the GV. It has a hollow space which is currently occupied by the silicone rod, so when you take that out and replace it with the STP with soft/flexible tubing it WON'T "clamp down" and cut off the flow much, if at all. That makes the conversion process for those types of STP's crazy easy. If you want to use firm tubing, then it doesn't really matter which packer you get to house it.
I most definitely intend to post up a "how to" on that because there's so little information out there on it, it'd be callus of me not to. But, it's likely going to take me about 7 – 12 days to post it up. The STP parts alone have to cure together with the adhesive for 72 hours before I can proceed with the other stuff, then it's got to be put together, then I've got to of course test it out (don't want to post this up until I know it's going to work out 100%), then upload pictures, write it up and then post it up. It'll definitely get done ASAP though, I promise.