It is very problematic to get them (I have the same challenge with my Midas consoles).
They are DIN 41620 ISEP connectors.
The only company that still makes those is: http://www.provertha.com/produkte/steckverbinder/din_41620_isep
I found a distributor in the Netherlands, but was quoted +/- 35,- euro for a 33-pin-female connector and +/- 20,- euro for a 33-pin-male
I found another manufacturer: http://www.fks.co.rs/fkse/elmos/konektor/07/index.htm (group 7), but no replies to my emails.