Can you give details on how you are shifting? Interesting concept I'd like to learn more about. Thanks.
pub 037e1238f7b1ce757df94faa9a2eb261bf0aeb9f84dbf81212104e78931c2a19dc
range 80000000000000000000:ffffffffffffffffffff
1step
sub 80000000000000000000 from pub >>033aeb4f818ca91912a3e50d1b3db196696f82713bae00ba2b53c09a23f1d284a0
and sub 80000000000000000000 from range>>new range 0:7fffffffffffffffffff
center of range it is 3fffffffffffffffffff
So again sub 3fffffffffffffffffff from pub>>02f65e6e18eab67f86287d565702468c2f30a303f22ebdcebe556c23d016350222
and sub 3fffffffffffffffffff from range>>new range 0:3fffffffffffffffffff
after key will be solved add 3fffffffffffffffffff and 80000000000000000000 to key.
edit: I guess you meant 80000...from the priv key