Can I buy RAL paint or Powder coat directly from RAL or VeriVide?

No, RAL do not produce paint in RAL colours they simply standardise the colours so you can buy the colour card from RAL (or VeriVide or other worldwide distributor) and then go to a DIY store or specialised paint supplier to buy the paint. They may have a paint mixing machine on site and can measure the colour card and mix paint to the correct colour to match the card. Likewise a manufacturer of Powder coat formulas should be able to mix the colour required to match a RAL chart.