I was looking at the forum, Yorkie fashions. There were tons of free patterns there and one I checked out had a really easy pattern for making clothes out of old t-shirts and things. I do know how to sew, but honestly if you can cut straight you could probably and sew them together pretty easily. If you know how to use a machine, it is just straight seams
I didn't look thru all the patterns…there are lots. But thats probably where the post you saw is. Good luck.