I think you will only find Alloy ones. the -71degree stem angle was typical road style for years.
if you are comfortable on this bike and really want to change the fork and stem the first thing you need to do is take good measurements. measure from the nose of the saddle to center of the stem clamp area and from the front axle to the same place. the whaterever stem or fork you use make sure the new bars in the same spot. DO NOT move the saddle in any way once you take these measurements. if your getting a new saddle too wait until you are done with the bars.
steel bikes and forks have been breaking for decades on the cobbles of Paris-Roubouix so I am not suprised a carbon/alloy fork failed
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk