With only having them a week, they wouldn't have had enough time to truly adjust or you to have a solid grasp on their social order yet.
Not to mention, they are entering their "puberty" stage and can be pretty sassy with one another. Be prepared for some bickering especially if you ads another. All my girls who I have had around the 6-8 month mark have gone through a dramatic period. If you want another one and are prepared with funds/space then there certainly isn't anything wrong with getting another. Just be sure you have a big enough cage. I would say that a group of 4 young active girls need at least a 2x6 C&C (16 square feet) or larger.
Overall, I wouldn't think finding an abyssinian would be too difficult, they are pretty common. Check out rescues, shelters or craigslist type sites near you, I imagine you can find one. On the other hand, finding a texel will likely be challenging. In all my years of owning pigs I think I have only seen 3 available for adoption. I have 2 texel girls, both were from breeders who were unable to use them anymore in their breeding programs and were not eligible to be bred, so they were rehomed to me as a pet only situation. Overall, they are much more difficult to get.