If you're looking for a rear window mesh screen that fits the 2023 ZForce 800 Trail G2 (Gen2), I found this one on Amazon that's a perfect fit at a pretty reasonable price.  It looks kind of small coming out of the bag, but when you install it with the supplied bungie cords it fits nice and tight without any wrinkles or flapping in the breeze.

https://www.amazon.com/dp/B09BV18TVK?psc=1&ref=ppx_yo2ov_dt_b_product_details