If the required course is free to the consumer, it does not have to be disclosed on the loan estimate at all, and if it's not disclosed there, there is no need to list providers for the course in your list of available service providers.
That said, you can, and probably should, give the applicant(s) a list of providers offering the course free of charge. Just don't combine it with your list of available service providers under 1026.19.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8