Is there a living 15.0 (slarm64) tree in existence?

I was using https://slackware.uk/slarm64/slarm64-15.0/ , but it seems to lack the most recent patches.

Is there an alive 15.0 version somewhere?

I am using rpi 4b, but I suspect that I can rebuild the machine-dependent parts myself.

AFAIK, there's no maintenance being done on slarm64-15.0. sndwvs had all his building machines on current anyhow, and his repo only offered current packages. Patches built on current (glibc-2.39) don't run on 15.0, which was back on glibc-2.33.

I'm sure you'll get stuff on Slackware Arm. From what I gather,they are very interchangeable anyhow.

Slarm64 is no longer maintained AFAICT. He's gone over to work on irradium, a crux variant. From what I gather, he's porting irradium to Aarch64 & riscv64 from now on. It's the same look & feel, XFCE, no systemd, etc. My RazPi has his last current image running (glibc-2.38, kernel-6.5.2).