There isn't a pattern for this blanket but you could certainly hack it! The dimensions are given as 60"x50", there's a garter stitch border (six or eight stitches wide, by my count) and a seed stitch middle -- super easy, especially because you can zoom in on the product photo and literally count how many stitches there are. And then you just have to make a bunch of pompoms so giant they're verging on mop territory (I love that you don't even need a pompom maker, because you just use an entire skein!), and four enormous tassels for the corners.
I know the yarn would likely cost more than buying this blanket, even including shipping, but the advantage in knitting your own is that you could choose the colour and the fibre content (wool or a wool blend, that would be my choice). Also you would increase your upper body strength while knitting, just because of the weight of the thing.