I would look to Hawe in Germany for retracts.
http://www.hawe-modellbau.de/english/I have seen myself some real nice OV10 retracts from Hawe, but it is only listed in their German PDF.
According to this, they have 4 versions, designed for 2.2 , 2.4, and 2.8 meter wingspan Bronco.
Kjell