Hi Ken,
Yes, the DLA-STANDARD-NL product is still valid to be purchased only through our website.
However, we are not accepting orders online due to vendor changes, this is why you are seeing an error or not getting through.
For this reason, we are redirecting our customers to purchase through an authorized distributor, they can submit an order with us and process the PO. You can find the list of our distributor network here https://www.nxp.com/support/sample-and-buy/distributor-network:DISTRIBUTORS
Please note that the product to find with them is CWA-STANDARD-NL which works exactly the same just the difference is you'll receive a package with the registration code on a label in it.
Best Regards,
Paulina