if the covers are removable with a zipper, we might be able to help you.

So great that you found someone who worked out a solution with you and for you. Lucky you with all those beautiful windows. And while the fabric on your couch isn't to my taste I love the way that colours from it and from your lamp work together. I do love colour in a room.

Most websites allow you to put in the dimensions you are looking for. And I had decent luck just putting in 24x26" patio seat cushions. ARDEN SELECTIONS Oasis 24 in. x 26 in. Plush 2-Piece Deep Seating Outdoor Lounge Chair Cushion in Desert Tan AM0KF42B-D9Z1 (homedepot.com) Arden Selections Oasis 26 x 24 in. Plush Deep Seat Cushion Set - Classic Red - Walmart.com One inch too deep: Amazon.com: RSH Décor Indoor Outdoor Deep Seating Cushion Set, 24”x 27” x 5” Seat and 25” x 21” Back, Choose Color (Gregoire Fresco) : Patio, Lawn & Garden Sorra Home 23 in. x 27 in. Deep Seating Outdoor Pillow and Cushion Set in Sakari Ink HD939421TESCP (homedepot.com) These are an inch narrower, but right depth. Latitude Run® Mccay Latitude Run® 1 - Piece Outdoor Seat/Back Cushion & Reviews | Wayfair These are the right size, but pricey: Eddie Bauer 2 - Piece Outdoor Sunbrella® Seat/Back Cushion & Reviews | Wayfair Eddie Bauer 1 - Piece Outdoor Sunbrella® Seat/Back Cushion & Reviews | Wayfair

No photos, but that's okay. Your local upholsterer can help you. I have this amazing gal who works for me. She will replace any cushion and make new (tight) slip covers with zippers. Houzz has a link: "Furniture repair and upholstery". Maybe there is someone in your area.