I've seen lenders funded EIDL dealing with the NAICS code issue:
(Brokers could try the same)

Dear SBA loan processor:

Explanation on business activity: NAICS code 611430 - Professional and Management Development Training.

I consulted my CPA regarding the appropriate NAICS code for my business _________. I have been advised that based on the nature of the consulting activities the business is engaged in, it falls under the NAICS category code of 611430 - Professional and Management Development Training.