need help finding replacement pillows and filter

My hot tub is Tropic Seas brand, Fiji model. I need to replace all the pillows and the filter. There's not much info online for Tropic Seas. I think they are the same as Artesian brand??? and I have learned that the filters come in a lot of sizes, different threads and thread diameters.

Can anyone help give me a product code for the filters and help locate the pillows? I would rather buy generic replacements than call a dealer and pay top dollar for OEM parts

TIA!