OK, you already have an answer. In general -
electrical appliances have an E-no. (on the rating plate). Enter it into a search engine with the term 'spare parts' and you should get lots of options...

Hello, unfortunately I have not yet found this UV bulb for my hoover!
I had asked here in my town and on the internet and also asked Hoover directly, they said it doesn't exist?
Please help again, thanks in advance!

Thanks for the help! Have a look at it!

Hi

There are a lot of online shops that sell this UV lamp. I’ll give you 2 to try. Kremplshop.de and Lehner versand. See the characteristics of the lamp and search online for a similar one. Easy to find