Hi Bob. Actual individual citation texts are not usually found in the histories but I will look in the IX Engineer Command history and see if I can find anything.
I don't think the 819th EAB published a unit history at the end of the war which is unfortunate since they are one of the two units in the IXEC that earned the Preisdential Unit Citation for it's part in the D-Day landings on Utah Beach.
Another source might be the unit period reports that are held at the
Air Force Historical Research Agency at Maxwell AFB. You can purchase a copy of the microfilm with the unit reports for around $30 or you can request they send you paper copies. I don't know the cost for that.
This is my next major project for which I will be soliciting sponsors ... to acquire copies of these films and convert them to digital form so they can be shared with others like yourself. You can see a sample of what these hold
here.
I'll let you know if I find anything in my sources.
David