What are the ITIN loan options today

I have a property.  My tenants want to buy it.  I am not in a place to be able to finance it for them.  They only have an ITIN number.  I have not been able to find a lender willing to work with someone with an ITIN number.  It could be a very good long term investment for someone.  I just have no idea how to get to the individual investors that may be interested.  Any ideas?