I think you basically need one with a deeper clear window pocket or one that's completely open and you could maybe put in a foam or fabric panel that just slides in place?

I think I've seen coffin shaped ones on eBay shown usually with those Japanese ball jointed dolls.

https://www.ebay.com/itm/134057702448?hash=item1f36763430:g:3zsAAOSwFChdpYad

Found this one on Amazon that might work for dolls.

https://www.amazon.com/dp/B09CQ4Y2V3/ref=cm_sw_r_apan_i_4X6P271ANX94FKH74ZQM

Hope these help.