Buy two pair of gloves, costume variety spandex, one red, one black. Cut* the sections and sew together with a stretch stitch or a serger to retain the flexibility and fit.
Not sure why what you are looking at are glove liners, those are winter wear type things. I would think costume gloves would be at the top of the google lists....
* When marrying two items together to create a single garment, you need to always remember seam allowances. If you cut on the design line, sewing the item will make it too small.