GUEST,Rob Burkinshaw - A quick web search seems to suggest there were a few different models with varying neck/head and tuner arrangements, plus 5-string, tenor and uke whirles. If you wanted a matching single replacement, you would need to find the right one. Depending on your banjo, it might be possible to find a set of pegs which would do the job, but wouldn't look like your originals.
There are arguments for and against replacing original parts with something different, but having an instrument you can play may outweigh it not being 100% authentic.
Quack!
GtD.