FOSSA Duvet Cover Set 100% Washed Cotton Linen Feel Super Soft Breathable Cozy 3 Pieces Bedding Sets Solid Dark Grey Oversized Queen

Fossa makes an oversized queen 98" X 98" https://a.co/d/0fbU0JAa I really like the feel and make of it. I have several. I use a king size cover for an odd size queen duvet insert. The extra fabric works ok, but the 98"X 98" is close to what you need.