I haven't seen any. I created a number of additional weapons for TA6 using the design sequences in Striker, then fudging the results to match (approximately) with existing weapons. The best way is probably the "Looks About Right" massive fudging method.
I tried converting some other stuff from FF&S... I couldn't even get things close. OF course I was working with the design sequences and I'd never actually USED FF&S before, so it was difficult for me. (Specifically I was trying to convert solar power plants for use on T20 ships/vehicles)