"a ready alternative" is a perfectly correct and usable phrase in written English.
You can use it to refer to an option that is available and easy to choose. For example, "If you don't like the first option, there is always a ready alternative."
Cutting national insurance provides a ready alternative means of backing those who toil.
In Latin America, evangelical churches now offer a ready alternative to Catholicism.
In other words, if supersymmetry doesn't work out, theorists do not have a ready alternative to take its place.
Thanks to all those years of pretend politics and Potemkin party-building, Russia does not have a ready alternative to Putin's party.
Arsenal have had all summer to address other squad positions that need strengthening, and having aimed all summer for another centre forward to share Olivier Giroud's load, the difficulty agreeing terms with Chelsea over Demba Ba, or having a ready alternative, looks like an absurdly risky oversight.
Leading Democrats see the threat of E.P.A. action as an effective way to keep pressure on Congress to consider energy legislation and as a ready alternative if the House and Senate are not able to come to terms on an energy measure.
More worryingly, because most Wi-Fi devices broadcast a list of known networks, a monitoring system could, in theory, collect the list and match it against databases of known Wi-Fi networks, which are used as a rough and ready alternative to satellite positioning in built-up areas.
Currently 95 percent of the ammunition used for recreation and hunting in the United States contains lead, he said, and there is no ready alternative at a similar price.
In a country with limited resources like Morocco, there was no ready alternative but to borrow the additional "boots on the ground" from the army in their stead.
But the ready alternative will be something from Hollywood.
Neither the victorious powers nor Louis's French subjects viewed his restoration with much enthusiasm, yet there seemed to be no ready alternative to Bourbon rule.
