According to the U.S. Mint, the Susan B. Dollar hasn't been produced since 1981.
Put Reagan on a dollar coin, and melt all the others down. It would soon be one of the most circulated currencies, which is why they put the most prominent people on the smaller denominations.
Stop printing paper dollars, and take the Susan Bs out of circulation, and the dollar coin will take off. Most vending machines accept them already.
Now, if you really want to honor Reagan, then name an airport after him... er, name an Aircraft Carr... uh, how about a Federal Buil... aw shucks, nevermind.
The Mint may not have produced SB Anthony Dollars since 81 (you sure that wasn't 91?). But when they released the Sacagawea Dollar, all I ever got in change from the Post Office (that was pushing the dollar coin) was the feminist dollar.