Are there better alternatives for these buffers?
An LM324 would be a better option. This has 4 op-amps in a single 14-pin package. This quad op-amp, and its sibling the dual LM358, are very popular general purpose op-amps. In large volume you can buy them for a few cents each. They do have their limitations, and will not do everything, but they are a good replacement for the 741.