HOW TO ORDER ADVANCED TESTING FOR NEW SNPs FROM FTDNA
From your personal FTDNA results page:
Click on the 'Order Tests & Upgrades' link (top left)
Click on the 'Order Advanced Tests' link (not Advanced SNP tests)
Select "SNP" under 'Filter Type'
Enter the desired SNP to test for, e.g. "Z381", in the 'Find' box
Click on the 'Add' link
Repeat previous two steps for additional additional SNP you want to test for, if any.
Click on the 'Next' link
Complete the remaining payment steps as instructed. Note: Advanced Test can only be paid for via Credit Card or PayPal. The invoice payment method is not available.