No such thing as a one wire regulator. The one wire alternator has the regulator built into it, there is just one main connection, alternator hot to battery positive. There is a another connection if you want the indicator light to work.
Low budget is pick up a used Delco integral regulator alternator (one wire). Another low budget is to pick up a used Delco separate regulator (or Ford separate regulator) alternator complete with wiring harness and put it in.