FlyingSpanner,
You can check out CAA's website and find out the list of approved schools conducting modular training in the USA.
Comair Aviation Academy:
www.deltaconnectionacademy.com
European Flight Training:
www.europeanflighttraining.com
IFTA:
www.internationalflighttraining.com
Tyler Aviation: not sure about their website try Oxford.
You can also try Western Michigan, not sure if they offer any modual CPL training.
Good luck with your flight training.