That's a very interesting lead... She seemed like she was a bit pudgy as her photo and weight/height indicates - she could have successfully hidden a six-month pregnancy depending on how much she was showing (read other ladies' posts on here concerning not showing much at six months).
The thing that gets me is that she was on her way home on the greyhound bus from visiting the friend in Pennsylvania... Specific location of PA not mentioned at link. Makes me suspicious. However, she was indeed last seen in St. Louis and I suppose they were able to track the phone call she made to her family from the St. Louis area. Also, the fact that her purse was recovered at the truck stop cafe, makes it seem likely that the individual (perhaps a trucker) snatched her from around that location. (A lot of these cases with females seem to involve truckers... Moral of the story: if you are a woman and are traveling, do not trust truckers!) It is entirely possible that if it was a trucker, he could have transported the body all the way to Pennsylvania, where she'd coincidentally been traveling from. That, or the body was dumped in St. Louis/the surrounding area, or a completely different area/state. If it was a trucker used to traveling across the country, I wouldn't rule it out completely. Another interesting thing about this connection is the clothing. At the link you shared, Deborah is said to have been into the latest fashion trends and liked wearing stylish clothes. Our Jane Doe fits the bill on that count; plus, if Deborah had a small duffel bag in addition to the single piece of luggage that arrived in LA, it could have contained the multiple shoes/articles of clothing found with the skeletal remains at the distillery. A lot of the time, while traveling, a person will put dirty clothes or a second pair of shoes in a separate bag in their luggage. If she had a suitcase with fresh clothes or toiletries, she may have wanted to keep her dirty clothes in a smaller, separate piece of luggage. It doesn't say how many pieces of luggage she decamped with initially.