I'm looking for a stem of approx. 95mm+ in length and approx. 30mm+ rise. Or, to put it another way: A 3.5" long by approx. 1" rise stem.
Here is my current stem.
2012 Cannondale Trail SL 29ER 4
1994 Cannondale Super V 1000
1996 Cannondale F500 rigid-fork 69'er
From the numbers visible in pics 1 & 3, you have a 120mm, 5 deg, 25.4 dia stem. Have you checked with a LBS or maybe Ebay, saw a few 90mm & 100mm with 20 deg rise.
'16 Cannondale Scalpel Carbon 2
'15 Niner SIR 9 SS
'14 Cannondale F29 Carbon 3