As promised, here's the crossword fabric available at Spoonflower:
A few notes:
— the blacks (and other dark colors) tend to wash out & fade really quickly on digitally printed fabric. I don't know how to fix this — anyone have hints for keeping them dark?
— this design is optimized for the upholstery-weight fabric. I haven't tested it on other weights. (That fabric is slightly off-white, too.)
— this fabric was designed for me by Beth Keller. She's awesome. You can check out her Etsy site, KellerDesigning. I don't know if she's taking commissions now, but you could always ask …