These any good?
https://sunledusa.com/productSeries.aspx?ser=XHxxX12DWB
Thanks for your reply,
these are the correct kind, but they need to be tinted red (like in my original post's photo). I can't tell if they are as I couldn't find pictures of specifically the red one,
SunLED's product description states "Lens: white diffused", so I am pretty sure they are not red. I am afraid you will have to paint them red yourself, with a suitable translucent red lacquer.
Nail polish has worked well for me in a similar application: Comes in some nice deep red translucent/transparent tints, has a good consistency, and comes with a handy little brush. And you will get some interested looks as you study the nail polish shelves. 
The LEDs on the photo in your original post look like they have a textured surface too -- is that important to you? That would complicate things...
I like the nail polish idea, if I can't find any other alternative, I'm definitely going to try this.
For the texture, right now I'm not certain if it really matters, the issue is, as I've said I'm gonna use these bar graphs for a reproduction project, but the photos I'm using as a base/reference aren't good enough to distinguish whether or not it had this texture as well, and I have no idea what kind of brand they had for their bar graphs (it's also partly why I wonder if any other identical bar graphs exist from other brands, or existed... Because if theoretically, no other brands did those in red, then it'd mean for sure that it had this texture).
What I know for sure though is I can distinguish it was an actual "molded in one" bar graph, and not individual squared leds set in array inserted in a bezel.