A Shimano Flight Deck Question:
 

I have a Shimano SC-6502 Flight Deck. I use it on two bikes with older STI shifters (Dura-Ace and Ultegra) with the SM-SC70 bracket. I am building a new bike with Shimano Ultegra ST-6703 shifters. I’m trying to determine if I can use the SC-6502 Flight Deck with the new ST-6703 shifters. After some research I have identified a bracket (SM-SC79) for the ST-6703 shifters. But there are two problems, 1) I cannot seem to find it available anywhere, and 2) I do not know if the SC-6502 Flight Deck will work with the SM-SC79 bracket. Has anyone been down this road or have any information on this topic? Thanks!