Not sure, but what about adding a small amount of bleach to
the wash water of the reproduction fabric.
It might make the new fabric look somewhat faded like the rest
of them.

requilt I think you may even consider going around each section with small applique stitch to make sure any more dont start raveling and peeling off also if you are not comfortable doing the requilting yourself ask around the churches in your area most have quilt quilds and take on projects like yours also they may even have material you could use i think one of the churches here does it and prices are very reasonable they were going to hand quilt a queen size for 125!!! i have seen their work and its fantastic good luck please post pictures when done

Good luck....Just bringing it out must bring you joy.