If you want an off the shelf solution you can trust, get a Hinton Full Power.
Yes, many linear PSUs are based off the same National Semiconductor app note. Hinton separate themselves from the competition through being perfectly and robustly applied.
Distribution is also important to prevent interaction between modules via the common impedence of the shared paths for +ve, -ve, -0V. Ribbons are worst, busboards next - bonus points for higher copper density, low physical area PCBs, the best by a factor bigger than 10 are busbars.
Don’t trust any company that claims to minimize noise with capacitors on a busboard, any child who has been taught ohms law can debunk that claim.