rcf,
Go to an up coming train show and purchase as many as you need, the older individual 072 & 711 controllers work the 022's also. If you can find an original set of full metal 711 Controllers they were the best Lionel ever built and never wear out.
PCRR/Dave
Note the big cool looking individual full metal switch controllers in the picture below, they were the best Lionel ever made and still work perfectly today.