Givifive Car Seat Gap Filler Set of 2, 3IN1 Seat Side Gap Filler Plug with Storage Slot & Hook Function, Soft Foam Universal Fit Car SUV Truck Fill Gap Between Seats Console Organizer（Narrow Black）

I bought many, and ended up keeping this https://www.amazon.com/dp/B0FHZYGRK7/?th=1 (same as recommended by the other poster), as it's the only one that fits.Even this one is an awkward fit, but sort of works.

I researched this a bit way back when and I couldn't find anything that I thought would fit with 18 Way Sports seats. I did put this on my amazon list for some reason which *might* fit with the 14 Way Comfort seats... I must of found someone using it. https://www.amazon.com/dp/B0FHZYGRK7/