Help my grandson get the diagnosis he deserves

My grandson Lynk is 2 and a half years old.
Since he was born, he has been in and out of specialists offices and hospitals, for many different reasons.
When Lynk was 11 months old his mum noticed he wasn't developing at the same rate as other children, this was a cause for concern and what started their journey for an autism diagnosis.
Since then they have been for many appointments and are no closer to a diagnosis through the public system.
In November my daughter was told a 4 month wait until he had an appointment, this week they were told a minimum of 14 months, even though Lynk is on the priority list.
Emily was fortunate enough to get in contact with a private company, who happened to have a free appointment for the 26th of march 2019.
This is a single, all day appointment which will get them the answers they need, this will open doors for funding from the ndis to help pay for any upcoming therapy Lynk will need and the continuing speech therapy he already does.
Unfortunately this appointment is $2000.
Being a young family with rent, bills and medical bills, they unfortunately do not have this money to spare.
If you could find even a spare $2 to put towards helping my grandson, his mum and dad i know they would be grateful.