the ls3/5a is still available as richard allens from electrades, brand new, kef t27 and b110 drivers with the 11 ohm crossover.. price a couple of years ago was 2.7 there abouts..
but since kef doesnt make the drivers anymore since decade plus ago.. someday the ls3/5 will go out of production.
stirling broadcast's made a new "bbc certified" ls3/5a and they come in awesome cabinets.. sounds pretty good.. 2.4k at music by design.. (but they were driven by a pair of $22k monoblocks during the audition... *wavac cough*)
linn also made some ls3/5s known as linn kans.. they were designed to have reinforced bass when positioned near the wall..
spendor too had a ls3/5, but eventually due to the easy failure of the kef b110 woofer.. they eventually came up with their own version of the 3/5, by turning the original ls3/5 sideways and using their proprietary drivers.. known as s3/5 or s3/5se..
the hype about the ls3/5 was due to hongkongers popularizing it.. in hk they just dont have space for massive audio setups and the ls3/5 was doing a good nearfield confined job..
that was how the ls3/5 became $600 -> $2000 used now