Do you want lysis of rbc? Instead of lysis buffer,there is another method as well,which I have tried, though I don't know what your actual purpose is. As for lysis buffer, you can use 10mM tris-hcl buffer, 1mM EDTA and 0.5% SDS.
Depending on the purpose, you can try the method of freezing and thawing for at least three times (without buffer) followed by a centrifugation to eliminate cellular stromas.