Hi!! Below is some links that a fellow YT member posted a few years ago! I hope this helps!
Here's one for belly bands and panties
Bichon Frise - Dog Panties
here's one for a fleece sweater
http://www.barlowscientific.com/tech...me/sweater.htm
here's a regular dog coat
http://www.sewing.circleofcrafters.c...stpattern.html
and their dog dress
http://www.sewing.circleofcrafters.c...sspattern.html
This lady makes and sells patterns.
You can look at them here.
eBay Seller: sewingfool41: Pet Supplies, Sewing Fabric items on eBay.com
Happy Sewing! I would love to see the finished products!