There are lots and lots of aftermarket filters available. A Chinese knock off may be fine. It may also not be! I'd cut one open and have a squizz before using one.
Hi Flo and Bosch are readily available as are many others. I don't know the numbers because I just use the UFI ones which come from a variety of countries of manufacture including Turkey, Indonesia and Tunisia! They all looked OK on examination so I just use them.....