With flipped psu so power cable on top I'm using 35cm which are a little to long.
30 should work but there won't be enough cable to route them any other way then straight to the back so routing them out of sight won't be an option.
I'm happy to send them to you if you can use them you'd only have to pay transport.
Thanks for your goodwill but I think parcel would cost more than the cable itself if you sent one to me.
I'll give 35cm a shot. Better to be bit too long than too short for how I want to route them.