Not to bury the lede, the Fimonda/Globact/AMK/etc. silicone inserts are a completely different animal from the Injora offerings. The non-Injora are wider, but how do they do in terms of rigidity/firmness, etc? Well, that's why we're here.

Links
Amazon is absolutely flooding with the non-Injora inserts. There has to be 30 different listings, and nearly as many "brands." These are the cheapest as of this posting.
108x42 silicone https://amzn.to/4bHHS7e

Maybe due to the holiday, but the availability of Injora on Amazon is WAY down. They only have the unusable reds available.
Injora 110x36 @ AliExpress www.aliexpress.us/item/3256806074713963.html
Injora 110x36 @ Injora direct
www.injora.com/products/injora-4pcs-silicone-rubber-inserts-for-118-122mm-1-9-tires

DIY Double Bun:
Timtin dual stage https://amzn.to/3SLkNrC
Medium hair buns https://amzn.to/3T11QlR

Canyon Trails https://bit.ly/3vGaCNd (on sale!)
Class 2 Tusk https://bit.ly/3MulUJV