HA!  My new P-38 parts came.  A used slide, complete for $70 slid right onto the frame without any problem, the locking block for the barrel popped right into place and the set-up both looks good and functions perfectly.  Would you believe the  used slide is 12 years newer than the original..  The 7.65mm Luger barrel for the P-38 is on the way and when the conversion is complete and fitted, my P-38 will have a complete original upper in 9mm and a complete dedicated upper in 7.65.  I have all the necessary components I need, so while I await the new barrel, the reloading fun begins.............