a better idea would be to sell that stuff and buy home audio equipment... car audio is made to take advantage of the high amp/ low volt power available from a cars electrical system. home audio is meant to take advantage of the high volt\low amp system in a house. You could likely buy a really nice powered home sub that would put that system to shame. You will never find a powersupply that will provide that amp with the power it needs to be louder then a dedicated home sub system or amp. (unless maybe you had a 220v outlet available)
if you want to keep your equipment and already have batteries available, then just buy a cheap battery charger. but you will only be able to play it for a little while then you will have to recharge the batts.