Two ideas
10/8/2018 at 1:07 AM
First, if available, you could buy an identical article and cut the fabric you need from it. Not the cheapest solution, but the fabric will match perfectly.
Second, if you only need a small piece, 8 x 11 or less you could scan the fabric you have and print it on cotton fabric sheet(s) specifically designed for an inkjet printer. The fabric would be different but you would have an exact visual match. Staples might be able to help you with this if needed.