If it is sufficient to use monochromous "icons", you might find something suitable in the unicode character table. In that case, use whatever icon suits you as the prefix text.
I'm afraid , but I've already deleted the model.
But - as posted before -you just need to import the attached temperature01.png on a 3d textured plate.
and place it over the text , you want to cover /replace by the icons.
Important for the right display of the icon in 3d are the icon dimensions ( 359 x 553 pixels)
When importing the icon to the textured plate, please set the plate dimensions (in m) accordingly (s.b.)