No, I don't, but I understand why Reagan is misunderstood by some to be a mean-spirited, racist fukk. The case for this belief is not unsound. He supported Goldwater, who opposed the Civil Rights Act of 1964. Those 3-4 months in 1964 from the time Goldwater opposed the CRA on grounds of "states' rights" to the moment he gave his nomination acceptance speech in San Francisco where he uttered the phrase "Extremism in the pursuit of liberty is no vice." (a phrase which my mentor in college and graduate school wrote, which I argued with him endlessly perfectly contradicted Lincoln) where a cringeworthy period in the history of the Republican Party. But Reagan was no extremist (he raised taxes, liberalized abortion laws, liberalized welfare benefits, and saw through the enactment of numerous environmental laws in California) and was far more a pragmatist than the ideologue the left paints him as. But it was useful for fundraising purposes to demonize Reagan and to this day he's by some to be the radical pre-Trumpian. (Reagan had many faults, but extremism was not one of them.)
Your general contempt of the Republican today, however, is well taken. This is a party that Reagan would not recognize and would not welcome him. Rep voters over the last 6 months could not tolerate even a right-wing lunatic like Cruz and laid waste to its moderates. We all have our own interpretations of what these Rep voters want and I have my own, but whichever one of us right (and it may be "all of the above") I want nothing to do with it.
Let's see how this plays out. If in the fall the Republican Party "establishment" genuinely embraces Trump, I will weep with Lincoln, Roosevelt and, yes, Reagan. If instead it keeps stiff-arms Trump even as it acknowledges that he's the nominee, fair and square so to speak, I may remain in and do what I can to rebuild it out of the ashes Trump will have left it in.
Either way, I'm in for Gary Johnson for now although I will leave the door open for Hillary to convince me she has an agenda worthy of a major party presidential nominee. As far as I can tell, her only rationale for seeking the office is that she wants it. That's not good enough. But she's by some distance the lesser of two evils.