Hi I have an Altec Lansing IM510 Sansa docking station which has a sub out for the BB2001 subwoofer unfortunately Altec does not make this anymore do you know of any subwoofers either singularly or in a set that have the same spec that could work.I don't want to blow my Im510 as that was hard enough to come by.I have contacted Altec but they are unable or unwilling to help.Any advice would be appreciated.Thanks Mack.