Hi,
you can use the foreigner corner and write in English there -
viewforum.php?f=32 .
There are scrap yards in Bulgaria and most of them in Sofia. You can find some of them and here in the forum.
Two of the bigger ones are:
STI.bg in Obelya -
https://goo.gl/maps/saMfSz9JUeJcLbEj9and
Imperia in Liulin -
https://goo.gl/maps/fsTTaWJYXeKXEa646STI also has a service.
You can also check LuboService -
https://goo.gl/maps/3dxy8DE2Wv6pGnTDA he also might have some spares.
You can find part numbers at
http://opposedforces.com/parts/ and also write here to mimo13 or Lio - they deliver OEM parts.