Ceramic Cap for Electrolytic

[vol.2]

I'm going through my Sony KV-9200, and replacing all the out of spec caps. There is an electrolytic on the neck board, a 0.47uf 500V cap between the G2 pin on the tube socket and the flyback.

I can't find an electrolytic cap that fits those specs at any normal outlet, so I just purchased a ceramic cap. Is there any reason I shouldn't use the ceramic in this situation?

Thanks