i noticed the turn at the bottom seems odd, but the block and such appears the same specs.

there are a few other companies, and a direct contact purchase might solve that shipping issue.

not sure is this is performance:
MAGNAFLOW® 51062 - Chevy Aveo 2009-2010 Direct Fit Pre-OBDII Catalytic Converter with Header

another UK one:
VAUXHALL ASTRA G&H 4-1 DE-CAT MILD STEEL MANIFOLD

the 1.8 in the saturn astra and the 1.8 in the cruze/sonic are the same design, performance parts for those should fit as well.