Looking for 2nd Battery,

[wwmotors]

Hi Altariders, is there any chance to buy a R Pack Battery? I want a 2nd battery, to swap on the MX track to get double ridetime without charging. What are the prices for batteries on the market, if there are any?
Cheers WW

By the way. My MXR has now 360 hours of MX on the clock. Still running like on day one!