I had some difficulty finding a grip designed for the DSI XL for sale online and ended up trying one for the New 3DS XL. It ends up fitting almost perfectly with a few small issues. The charge port is covered so I had to cut a hole for it. It also covers the volume controls, stylus, cart slot, and headphone jack. Other than that it is very comfortable so far. I thought I would put it on the record in case someone in the future is looking for something similar.

MXRC Silicone Rubber Cover Skin Case Anti-Slip Hand Grip Customize for Nintendo [NEW 3DS XL] x 1 Pink, Not for Old 3DS XL https://www.amazon.com/dp/B07CWMN6F9/ref=cm_sw_r_apan_i_WG0GCXWK4SY6BHFJ614B?_encoding=UTF8&psc=1