Etsy store Pieces by Polly
is selling made-to-order Harry Potter quilts that represent the four houses of Hogwarts. The quilts, which Polly says take 8-10 weeks to make, are selling for $216 and up. Right now, she's only making them in baby square and child/throw sizes, but she says you can message her to find out when/if she can make larger sizes. But be prepared – a queen-sized quilt is priced at $1,081.
Polly says she also makes quilts that represent single houses, like this one for Gryffindor:
She also does a pretty cool Star Trek quilt:
More on the Hogwarts quilts:
The quilt top features 25+ different fabrics in rich colors representing each of the four Hogwarts houses with rich metallic gold and silver accenting on some of the fabrics. This quilt is sewed from my own pattern. All fabrics are 100% quilt-shop quality cotton prints, purchased from my local quilt shop or a selection of my favorite online shops. The fabrics in your custom quilt will not be exactly the same, but will be similar depending on fabrics available. The back features a large yellow-golden pair of round spectacles and a lightening bolt. You may request a golden snitch applique or Deathly Hallow symbol instead if you prefer. Appliques and black fabric on the back are high quality Kona cotton solids. The quilt was quilted in black thread on my home sewing machine. The binding is double thick and machine sewn for durability.