2012 rzr 170 need advise

I just picked up a 170 from my brothers neighbor for a steal but I need some advice on parts. The top of air box and filter is gone. My question is do I buy a factory replacement lid or is there a better aftermarket solution for this. I need a choke cable too. Also is there anything I need to check besides the obvious fluids and general maintainance items. Thanks in advance
Steve