How do you create a custom replication between normalized and denormalized form using SQL Server

I have a table (on SQL Server 2008) that is denormalized like so:

Table: PhoneNumbers
Field: Partial varchar(8)   -- 123-1234
Field: [Data]               -- Refers to 800-123-1234 Data
Field: [888Data]            -- Refers to 888-123-1234 Data
etc

Table: OtherTables
Field: PhoneNumber varchar(10)   -- 8001231234

This design creates a nightmare in the code base and stored procedures when it comes to joins. The problem is that PhoneNumbers is tightly coupled to a large legacy Access database, so it cannot change.

I would like to create a replication of PhoneNumbers to a table like this:

Table: PhoneNumbersNormalized
Field: PhoneNumber varchar(10)    -- 8001231234
Field: [Data]

Any changes to PhoneNumbers should update PhoneNumbersNormalized and vice-versa. The goal being that users of the legacy Access database can continue working against the PhoneNumbers table, while services can work against PhoneNumbersNormalized