Perhaps this is an option, just across the ditch...
https://en.toutlehautparleur.com/compression-driver-faitalpro-hf201-8-ohm-2-inch.html
https://en.toutlehautparleur.com/compression-driver-faitalpro-hf201-8-ohm-2-inch.html
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I have, though it’s been some time since I did, so this is an older memory. My impression at the time is that the speakers sounded a little thin with the 300B. The Calpamos dip down to 5ohms at about 35Hz. Now that it’s been some time, and the speakers have definitely had enough time to loosen up a bit, I should try this combination again. My 300B amps are also wired for 8R output, so it’s a bit of a mismatch. I haven’t yet installed a switch to toggle the output between 4R and 8R. I have the switches, just haven’t installed them yet. This is likely to be my next mini project.