I found out today that my 36V 20AH LiFePO4 battery is on it's way from Hong Kong. I ordered the expedited delivery so that it would arrive in 3 or 4 days rather than the 5-7 weeks land delivery that was free. I guess the land delivery means that it would be delivered by slow boat from China! :-)
I've already ordered a beam rack for the back for the battery pack and I've also bought a small tool box to protect the battery.