2011 Polaris Sportsman 850xp eps rear cargo lock n ride box

Looking for a Rear lock N Ride Cargo box, What is the part # for this particular year and model?

I keep seeing options for the "Touring Sportsman" but not the regular Non-Sportsman model.

I keep finding options with the pt# 2878154 …will this fit a regular Sportsman 850 or just the Touring style?

If not can anyone please recommend a rear cargo box (Manuf. Name and Part #) for the 2011 Polaris Sportsman 850xp EPS model.

pics would help a lot! 😉

Please advise?

Thanks in Advance