@adambegood No but it's easy to adapt.
Open an existing system.svg and delete the current logo.
Open that PC88 svg file, select the paths, copy and paste in the previous system.svg, scale as needed to fit, save.
That's worked! Thank you so much for the heads-up on that. I've found coloured Naomi and Atomiswave svgs now as well, the Theme is looking good!
Edit: I won't post them as don't anticipate demand, but if anyone wants PC-88, PC-98, Naomi or Atomiswave svgs, give me a shout!