Hi Wendy. I knit for dolls but not for the ones you mention. I have sometimes found patterns on eBay -- you might look there.
It is possible that you might need to check to see if there are any for dolls similar in size that you might adjust to fit. It seems like I see more vintage patterns on eBay - which are fine for some of my dolls but not for others.
I normally knit for Sasha dolls or American Girl dolls. My grand daughter has a Euro girl which is more the size of a Magic Attic doll and I have made the Sasha patterns a bit bigger or the American Girl patterns a bit smaller to fit.
One easy way to do sweaters is to use a top down pattern - actually one could probably plug the measurements into a top down pattern formula and make it work. I find it is easy to adjust the size of these to fit. I use one that is made for Sasha and just add a couple of rows here and there to fit my grand daughter's doll. Of course, it helps that I have a selection of dolls to try things on here.
I am not sure how the measurements on the dolls you mention compare to others - there are some doll measurement charts on the web, so you might check there.