he following model is a replacement part for Cat transporter.
it requires minimal hardware so it is sturdy since the original ones rely on Plastic bending and that's it

Use PETG, since The part needs to be tough and able to flex a bit 

Hardware :
M2x20 Pins x2 (would work with longer pins like 25 or 30 mm)
link for the ones i purchased and use for other projects as well:  https://he.aliexpress.com/item/1005006134897912.html?spm=a2g0o.order_list.order_list_main.77.5cb11802fV1v6Z&gatewayAdapt=glo2isr