I'm going to recommend against attempting to use cables from one brand in another PSU but if you have them on hand and they look like they'll fit and the temptation is just too much not to try... I will highly recommend the use of a multimeter to make sure the pinout voltages are correct.
I was going to use IceModz.com if I end up going with Custom cable sleeving, but figured it'd be easier if I could just buy some presleeved that looked amazing. Thank you though, your insight at least gave me knowledge not to do that. haha I know little to nothing of electrical engineering.