Content of Negative Report re Covid 19 infection for travel out of Australia

A few question for Aussies who have obtained a 'Negative Covid 19 Report' and submitted the report to gain the COE from the Thai Consulate in Sydney:

- Did you attend a Certified Pathology Lab to take the swab test?  - Did the report come back very promptly?

- Do you know if anybody has obtained a negative report by attending a mass testing venue and sent that report to the Thai embassy to get the COE?

- Do you know if the mass testing report has different content to the report from visiting a Path. Lab. for the swab test. 

I'm asking because I need to get a COE to return to my family in Thailand. I'm in a wheelchair.

I've called several Path. Labs. to ask if they can visit me to take the swab. Answer NO.

Or, if I call them well in advance can I have a booking for the test at a date/time, at their lab. which will keep me within the 72 hrs 'rule'.

Answer 'You have to take your chances'. 

And most have quoted fees between AUD195 - AUD300 (plus of course taxi fares to and from the lab. location.)

Any comments/experiences you can share very welcome. Thanks.