"But the other has, on the band behind the trigger guard, a crown with GR (George Rex), date 1924, and Enfield ShtLE. The amazing thing is, it has matching serial number 175 on the rear of the bolt, magazine and barrel. The flip up sight only goes to 1400 yards though. Could this be a trials rifle?"
If by "flip-up sight" you mean a folding sight mounted on the back end of the receiver, then it is probably a messed-up SMLE MkV. The backsight was marked to 1400 yds and the number and receiver date would be plausible. A MKV is worth restoring.
"The contact in Englandsaid he would normally have them but his woodworker is critically ill and may not be back."
If by "contact" you mean EFD in Kent, then I must tell you that I am not aware of any other source of parts for a MkV. So you would be into a fairly heavy DIY operation.
But PHOTOS are VITAL !!!