Benzaclin alternative

I was given a few free samples of Benzaclin during a year-long period from my dermatologist.  It worked very well, but unfortunately, my insurance does not cover it and therefore is extremely expensive.  I have tried other lotions but nothing works even close to as well as Benzaclin.  

I noticed the two main ingredients of Benzaclin are benzoyl peroxide 5% and clindamycin 1%.  Benzoyl peroxide is easily available at local drugstores and there is a generic clindamycin 1% topical lotion that my insurance does cover.  Would I be wrong to think that if I use the otc benzoyl peroxide 5% in combination with a prescription of clindamycin 1% I will receive the exact same benefits?