Self closing fabric wire wrap, there’s also a Velcro and fabric variant. A lot easier if you can’t get a tape roll to go around that wire bundle. You’ll need to determine diameter needed.
Basic DYI solution is a black sock or material split and with Velcro hot glued to each side to wrap and close as needed.
Still use plenty of cable ties to tightly the loom to get it as narrow as possible
Example of a self closing wrap.
