I'll be giving a talk about keyboard alternatives at the Trenton Computer Festival (https://tcf-nj.org/) on March 16, 2024. I wanted to buy a Twiddler in preparation for the talk, but I see that Twiddler 3 is no longer being sold. Can anyone come to the festival or lend me a Twiddler (with some kind of collateral) so we can show it at the talk? Alternatively, does anyone have an older Twiddler to sell or give away?