From Books Online it appears that while the import/export wizard won't let you use a .dbf file, SSIS can be configured to use one:
To configure a connection manager to connect to a dBASE or other DBF
file Add a new OLE DB connection manager to the package. For more
information, see How to: Add or Delete a Connection Manager in a
Package.
On the Connection page of the Connection Manager dialog box, select
Native OLE DB\Microsoft Jet 4.0 OLE DB Provider as the Provider.
When working with DBF files, the folder represents the database, and
the individual DBF files represent tables. Therefore the Database file
name text box must contain the path of the folder where the DBF file
resides, and must not include the file name itself. You can type or
paste in a folder path, or you can use the Browse button to select
your DBF file, and then remove the file name from the end of the
folder path.
On the All page of the Connection Manager dialog box, enter dBASE III,
dBASE IV, or dBASE 5.0, as appropriate, as the value of Extended
Properties.
Click Test Connection to validate the values that you have entered.
You should see the message, "Test connection succeeded." Click OK to
close the message box.
Click OK to save the configuration for the connection manager.
To use your connection manager in the data flow of the package, select
an OLE DB source or destination and configure it to use the connection
manager that you created by using the preceding steps.