Front Glass Screen 21.5 iMac 2017

Hi everyone. I am trying to find out where to buy the correct front glass (just the front glass) for my 21.5 iMac 2017.

I have searched around and only find 2009 - 2010 - 211's info.

Are any of those compatible?

Someone told me I have to buy the whole thing because it is fused, but I kid you not when I tell you I once separated the front glass (don't remember why I did that, it was a long while ago but I have it in my mind having opened it and closed it). So, I keep thinking it is possible to buy just the glass and not the whole thing. If buying the whole LCD is the only solution then pardon me, it su..ks, it would be so unpractical, aside from being very expensive. :(

Thanx for any light on this matter!