I had a non-stock bracket for one of my hydros and an rd-17 — it looked a bit like the stock bracket, but the portion where the steering pulleys were affixed was extended downward by about 3-4 inches, dropping the pulleys to a below decks level.. I don’t remember where I got it, but I know I didn’t make it… not sure who did.
You can purchase pulleys that perform like a roller — they have zero degrees of freedom and are meant to be installed in your rear fairings to bring the cables above decks.