Would it be worth trying to fix up this pair of Vintage Sorel Kaufman Canada boots? Leather is pretty stiff, but they seem to be in decent enough shape still. : r/BuyItForLife
Amazon.com: The Felt Store Replacement Boot Liners: Wool Blend, Polypropylene, Radiantex™ (816 GWR) - Standard Boot (approx 10” high), Size 6 : Clothing, Shoes & Jewelry
Sorel Replacement Wool Boot Liners - New - Size 5 - clothing & accessories - by owner - apparel sale - craigslist
Amazon.com | Wool Felt Replacement Boot Liners: 75% Wool, Navy Blue (826 BB) - Standard Boot (Approx 10” high), Size 8 | Snow Boots