i don't know if this fits your application:
4/10 HP SEWAGE PUMP
Wayne 4/10 HP Sewage Pump - Completely Submersible - Chemically
Resistant Thermoplastic - Vortex Impeller Pumps Up To 4,680 GPH @ 10'
Head - Moves Up To 2" Solids - Mfg #SEL40
THDS Part #: 594810
Mfg #:
Manufacturer: WAYNE
Made In: USA
www.hdsupply.com

but first read about all basement stuff at:
http://www.buildingscience.com/resources/basements.htm