Buying traditional Deboicht fins might be a difficult thing in the future. The rumours are that he relocated to Thailand and work for a commonly known board brand to develop fins together along with the slalom board line but this are just rumours.
I (180cm @ 78Kg) used the 107 from 2011 a couple of times, mostly with Sonntag-fins SL-P in 38 and 40 which are going quite well. These fins are very forgiving due to their soft design. When the wind got harder I switched to a Talon in 38cm. For the 7.9 ~ 7.1 I would defiantly recommend a powerful fin as board feels quite small. Top speed wise the SL-P might not be the fastest but overall it is a very good compromise.
I've never used the 2011 127L but I'm testing the 2012 now since a month with my Vapor 8.6 and my Hurricane SR2 in 45cm. In stronger winds a very nice combo but for less wind I ordered a bigger Hurricane fin in 47cm. Best speed with the 45cm and the 127L was ~55km/h in the open sea, quite promosing.
Our local pro's are going for Z-fins but as they cost ~50.000 Yen ($625) it is a too expensive toy for my.