Anyone replaced the cover on the mirror?

I've got a replacement sun visor but the condition is not as good as mine so I just want to switch covers & can't figure out how to get the mirror out of the visor. Are there screws behind the lens covers? If so, how do I get these out without breaking them. Do they just pop out?
I've tried prying them out with a flat screwdriver but looks like it may break so I stopped.

 

What do the hinge points look like on your old visor? Can you snap a closer picture?

 

The hinge clips are spring steel or some such metal & don't bend or move in any way. The cover has a 1.5mm plastic hinge pin & I figured it wasn't gonna come out intact. Got impatient & split the old visor which is simply glued around the edges. Came apart easily. The mirror is clamped to the face of the visor from the inside. On closer scrutiny it is evident that it was not designed with repairing in mind so I split the newer one & replaced the whole unit. turns out the bulbs were blown or burnt out on my unit anyway. Now I just nust need to get some fabric glue in the morning & all's good.

 

Sounds like a plan. Keep up the good work!

 

Glued up the sun visor with contact adhesive & all's done. I'm a happy bunny!