As Defragster has pointed out, I have some of the Teensy 4.1 in stock, though I am a little surprised he can see my website at all.
Most of the ones I sell are the value-added 'Fully Loaded versions, i.e. modified with additional memory or for use with our Prototyping System for Teensy 4.1 baseboard.
I keep a small quantity of each of the Fully Loaded versions and ones with just the pins added in stock for quick shipment and a pool of the base Teensy 4.1 to build up more of the different variants as needed.
I don't show all of the base Teensy 4.1 inventory in the store to avoid having one large customer snap up all of our base stock. That becomes a problem once PJRC and the large distributors run out and people are forced to go to page 2 of the Google search to find more inventory.
To help with the current shortage, I will be occasionally releasing more of the base Teensy 4.1 until PJRC is able to restock, hopefully by July. To make them easier to find, here are the links to the 3 main variations:
Basic Teensy 4.1 with or without pins installed:
https://protosupplies.com/product/teensy-4-1/
Fully Loaded version with pins installed along with additional PSRAM / Flash memory and ethernet header:
https://protosupplies.com/product/teensy-4-1-fully-loaded/
Fully Loaded for Prototyping System version with pins installed along with additional PSRAM / Flash memory, VUSB trace cut and diode added and bottom mounted ethernet female header and Host USB and VBat headers. These will work in most baseboard setups that bring the I/O out from the bottom of the Teensy like shown in the bottom pic. They will NOT work with solderless breadboards:
https://protosupplies.com/product/teensy-4-1-fully-loaded-for-prototyping-system/
We are setup to ship within the USA, but we do have international customers order from us using one of the many freight forwarding services which seem to work well.
--- Ken