I would suggest that you go for linktronic or you can contact Beowrold member Ulf who can actually convert any DVD player you want to become compatible with Beo4. I already have 2 converted from Ulf for many years and they are still working perfectly!!!

I have an Avant TV with a DVD Controller  Mk II  Type 4047

http://www.beoworld.org/prod_details.asp?pid=1272

This Scart cable connects to the TV and DVD player, it has an additional IR eye which sits in front of the IR display of the DVD player and allows control of non B&O DVD players using the Beo4 remote. 


A thread about the DVD Mk I and Mk II controllers is on Beoworld

/forum/general-discussion-and-questions/new-top-beolab-coming-after-summerearly-fall----55keuro#post-2042549

The non B&O DVD players it works with is rather dated now, but I have an excellent Panasonic  DVD-A360 which is a much better player than either the B&O DVD1 or DVD2 players, even the built in DVD player on the newer Avants is not up to the usual high quality B&O standards we have all come to love and cherish  :-)


DVD Players supported by the  Mk II controller

Onkyo DV-S535
  
Panasonic DMR-E50
Panasonic DMR-E53/DMR-E55
Panasonic DVD-A360
Panasonic DMR-EH54D
  
Philips DVD950
Philips DVDR70/DVDR75
Philips DVDR80
Philips VR200
Philips HDRW720
  
Pioneer DVDR-3100
Pioneer DVR-530H/DVR-630H
  
Sony RDR-GX3/RDR-GX7
Sony RDR-HX1010
Sony RDR-GX210

there are also the Scart leads that Linvis ( in Germany ) make

http://linvis.de/shop/index.php/cat/c17_Scart-Controller-DVD.html/XTCsid/db28ff1de6ed0415d68dc201aee1832d

and Ulf Kiener  ( also in Germany )  - select  Bang & Olufsen down the left hand side

http://www.ulf-kiener.de

and One Remote in Denmark

http://shop.oneremote.dk/catalog/index.php?cPath=43_44

and Keymaster from Stone Design  ( also in Denmark )

http://stonedesign.dk/en/features_linkconverter.html