I found these bars on Amazon that might be a good replacement:

https://www.amazon.com/dp/B00MPR5PA6/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=86UO1YBF72LJ&coliid=I11ICPUIKXL3SU&psc=1

I haven't tried them yet, but the macronutrients and calories are comparable to the P90X Peak Performance bars.