The NSW Rural Fire Service has set up a bank account for donations, while a GoFundMe online page canvassing funds has been launched by a former firefighter.
Pledges will support Mr McPaul's wife Megan and his child, due to be born in May.
More details can be found at the RFS website.
Mr Spriggs said he spoke to Mr McPaul's mother Christine and had her blessing for the fundraising.
"It's my way of helping a family through a tough time," Mr Spriggs said, noting no funds will pass through him.
He previously established a GoFundMe page which has raised around $380,000 for RFS volunteers Geoffrey Keaton, 32, and Andrew O'Dwyer, 36, who died last month.
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Members of the public have also donated thousands of items for firefighters and those impacted by the blaze burning in the Upper Murray.
Bruce Barnes, a volunteer firefighter of 40 years, said he had never seen anything like the support shown by the community in recent days.
Hundreds of people have dropped off a range of items at the Lavington Rural Fire Brigade, including tens-of-thousands of litres of water, tonnes of food and clothing.
A small army of volunteers helped sort through the donations, which have been sent to firefighters and those who have lost homes.
"I've never seen anything like it," Mr Barnes said.
"There are 12 pallets of water in the shed.
"The support has been great."
Donations can be made to the brigade on Thursday from 11am to 4pm.
Clothes, linen, shoes, toys and furniture are no longer required.
Andrew Gunn has made multiple trips to the fire front after launching an appeal for goods on social media.
He said he had a connection to the area through football and was spurred into action by the death of Mr McPaul.
"I wanted to get involved in any way I could," he said.
Larger items, including whitegoods, can be donated at the Lavington Sports Club between 9am and midday on Saturday.
Mr Gunn said the items would help victims set up temporary accommodation.