I hope this does not violate mailing list decorum but I thought there might be interest here. I have produced a set of APL keyboard stickers for those who wish to adapt their current desktop or laptop keyboards to have APL symbols. Dedicated desktop PC APL keyboards are over $100 USD, and laptop keyboards can't be replaced easily, so these are an ideal solution -- I now have them on both of my laptops (Dell XPS and Acer Aspire) and am very happy with their appearance.
The initial production run was for 1,500 sheets, so I have plenty for educational bulk orders. They match standard GNU and Dyalog APL layouts.
If I sell just 30 of these, I can recover the cost of the current black sticker production run, and will consider doing a white version. I have already received a few requests for those to use on the Raspberry Pi 400 keyboard units.
-Russ