You might be best going back to the data provider and asking them to use the Europe/Xxx style 'Olson' IDs.
The alternative is to write your own DateTimeZone provider that maps the E/A and offset data to simple time-zones, but I suspect that may be quite complex.
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You might be best going back to the data provider and asking them to use the Europe/Xxx style 'Olson' IDs.
The alternative is to write your own DateTimeZone provider that maps the E/A and offset data to simple time-zones, but I suspect that may be quite complex.