Hi. If it is for any special application, you can "make it" yourself. With two capacitors of 4400 uF in series (connecting their negatives) you will have the NP capacitor you are looking for. I leave a link on this page to guide you. In general, capacities are divided and tensions add up. Regards https://yoreparo.com/electronica/preguntas/1069934/reemplazo-capacitor-no-polarizado-6-8uf-50v