Lii audio drivers are available in USA and Europe, I first found them on a Facebook group, extreme loudspeakers. They sell various full range drivers, from 5" to 15" I was first looking at crystal 10 but at $1000
I was reluctant to take a punt on them. After discussions with the makers I was offered the forerunner of crystal 10, fast 10 at a sensible price, was $540 but with some haggling got them for $420 posted to uk. I built one box with a slotted port rather than two round port tubes of 80mm x 150mm long that I couldn't find anywhere. Drivers arrived yesterday and I cut the hole in the baffle for the driver. I'm running it in my workshop with an Audax AP170 for left channel, just to give the amplifier some load. Initial findings are its very detailed and fast. 99db, playing from a tuner, radio stations are hard to find and most have presenters that like to talk rather than play music. Listened to classical guitar and its exceptional. 15 minutes of playing and I don't expect too much at this stage but definitely got potential. Today I listened most of the day and although the rsdio stations play some rubbish, it was good to find something with bass and its performing well. I expect a longer break in.