As Adam pointed out Lucasfilm is the one that is saying no to the sisters being made. That may change since one of them died. It would be nice that the other release the rights upon her death.
I do not get why people are not satisfied with the grim reality of these being off limits.
People are not satisfied because the issue of likeness can be easily worked around as I mentioned in a previous discussion on the topic (not to stray away from the Willrow Hood topic, but this deserves an answer I think)...I'm of the thinking that these are still valid choices to suggest as Hasbro could still make these figures IF they were not to use the likenesses of the actresses. The headsculpts and any packaging material can be made such that they do not look like the actresses - we know Hasbro already does this as many times the headsculpts don't match the actors and they use stylized imagery for their packaging. Unless Lucasfilm puts the kabosh on this, I don't see any reason for Hasbro not making the figures so long as they don't resemble the actresses that played the characters. In fact you can go one step further, in EU the two women we see in the Cantina have been established as NOT being the Tonnika Sisters, but instead members of the Mistryl Shadow Guard. So in essence Hasbro could create a new look facial look for the sisters with the proper explanation in the bio.
It's doable, but Hasbro pretty much has their panties in a bunch regarding this, so a much desired pair of figures is left to apparently never be done. Meanwhile we got the re-sculpt no one wanted in the form of one of the biggest pegwarmers from the vintage AND modern eras. I'm not taking Scott's bet, I'm SURE that the Rancor Keeper if produced in standard numbers will be pegwarming in the same fashion as Saesee Tiin and Breha Organa.
Willrow Hood on the other hand if not produced in standard numbers, which is quite possible, I believe will not be readily available after the first month or two of full retail distribution. Similar to the Concept Anakin right now, I can find every other AOTC wave figure easily but not that figure, or the 30AC McQuarries of 07.