Adjusting presets on Boothroyd Stuart Meridian 104

An adjusting tool was originally provided with the Meridian 104 for its tiny presets. No surprise that the tool was not included with the Meridian tuner that I purchased recently--the original owner in the U.K. lost it a decade or more ago. Any suggestions for a replacement/substitute?
You might want to check on the Hitchhiker's Guide to Meridian at