Ah! Good, I thought I had seen it somewhere, just couldn't remember where.
Glad to see I wasn't imagining it. Human memory, can't trust it.
They changed the assets to use the visible ones. And looking through the image assets, the answer is "no, you cannot, they aren't there."
Just getting to 600 Trust with the girl will allow you to have a poly relationship, BUT you still have to ask the girl if it is okay, and she has to like/ respect the girl you want to date in order for her to say yes.
Also, if you had a poly relationship in 0.3d and import it into 0.4a, there is some evidence that wacky things can happen due to the changes in the requirements no longer being met.