Hi TheStig3566,

the translucent mirrors of A33, A35, A55 are the same. I did some resereach on the web and it looks like this is the spare part number: A1789528A. (But please get that confirmed before ordering)

In addition or as an alternative to Nedis, you could also contact a repair centre to find out, if you can purchase it through them or how much it would cost to get it replaced by the repair centre:

http://www.bss-online.co.uk/repairs_alpha.php

As far as I know a damaged translucent mirrior will not be covered by warranty. As this part of the camera is very sensitive against finger prints and scratches, maybe it is better to get it replaced professionally, before scratching/touching a brand new one by trying to put it in...

As long as your autofocus is not acting up because of the scratches, you will be fine. You will not see markes on the photos caused by scratches, but you may have a tiny bit of loss of light. This is negligible and will be compesated by the metering system of the camera and you will not notice it.

All the best!

Jules