Matter of fact, he selected one as his running mate in ‘80. Guess that makes Ronaldus Magnus a RINO. Oh, well.
Matter of fact, no one has named a single RINO Reagan campaigned for, let alone against a solid conservative. That was the original statement.
Picking a running mate is often a very different matter, and he was not yet strong enough in the party to dictate everything in 1980. Many believe picking GHWB was Reagan's worst mistake, and planted the seeds for the undoing of much of the advancements made by conservatism during his presidency.