As a budget alternative to cable combs, a strip of card lined with double sided tape can be placed between 24pin cables to create a similar (and somewhat more hidden) aesthetic. :
CableMod PRO Cable Comb Kit-Black – CableMod
PC PSU Cable Combs by BaGooN - MakerWorld
Generic PSU Cable Extensions Kit 30CM With Cable Combs For ATX | Jumia Nigeria
PSU Cable Extensions Kit 30CM With Cable Combs Extension Power Supply Cable 24Pin 8Pin(4+4) 8Pin(6P+2P) For ATX Power - AliExpress
Braided Atx Sleeved Cable For Power Supply Cable Psu Connectors,extended Cable With Cable Combs,24pin / Gpu 8pin / Cpu 8pin / 6pin,black/ Red / White | Fruugo QA