This is a very sad thing to happen to something that is so special. It would appear that the dye used in th manufacturing process destroyed the strength and elasticity of the yarns and they shredded. I would suggest that you contact a guild of LQS and ask for the name of a quilt appraiser or restorer in your area who could give you an expert opinion before you do anything. The solution is not easy for sure but you need accurate information before you start.