If I were you, Id just buy the LDC paints from Puppen Traumland, thats where I get mine and I get all my stuffing materials from them as well.
If you want the Liquitex you may have an easier time finding the Heavy Body type which works just as well, you just have to mix it well with a medium and water. I have one tube because I can find it at the artist/craft stores here in France. I just put it in my dish with a bit of water and smash it around with my mixing brush until it is completely diluted into the water, then I add a medium, like Liquitex matte medium. They do have some on the French Amazon…here is a link if you want it. https://www.amazon.fr/Liquitex-Professional-Peinture-acrylique-fluide/dp/B002643ELK/ref=sr_1_2?ie=UTF8&qid=1510404363&sr=8-2&keywords=Liquitex+soft+body&dpID=51D4xWcg3XL&preST=SY300_QL70&dpSrc=srch
I like the big pots but if you get them, don’t take the covers off or the paint dries around the lid and they are hard to open. I just pull the cover off a bit so I can put my brush in.
If you want to use the LDC, Id just buy all the reds, pinks and the skin colours and you can use those for mouths and lips…Or, if you need to, I think the large set is very low priced and you could always get that.