Crystal structure database search for space groups
You could use COD SQL interface. For example this little Python script returns all entries in space group F-43m that contain Si:

#!/usr/bin/env python
from mysql import connector
con = connector.connect(user='cod_reader', host='sql.crystallography.net',
                        database='cod')
cursor = con.cursor()
cursor.execute("""select file, formula from data
                  where formula LIKE '% Si%' AND sg = 'F -4 3 m'""")
for n, formula in cursor:
    print n, formula


The script prints entry number and formula for each matching COD entry:

$ python cod.py
1010995 - Si C -
1011031 - Si C -
1011254 - Al13 Cl F9 H9 O29 Si5 -
9000281 - Al13 Cl F3.84 H14.16 O34.16 Si5 -
...