I found the necessary gears for my early Borgia I (serial No. 1111) in the Mc Master catalog back in 1992, and would think that they might still have something which would work. The early Borgias used the same valve as the Florenza and the 9-15.
Thanks all. I will give it another try!
Clay
Arthur W. J. G. Ord-Hume's Laws of Collecting
1. Space will expand to accommodate an infinite number of possessions, regardless of their size.
2. Shortage of finance, however dire, will never prevent the acquisition of a desired object, however improbable its cost.