The #saveGBWR crowdfunding campaign, which has so far raised over £10,000, was launched following UK Sport's decision to cut funding for the sport last month.
Peter Bowles, co-CEO at Dynamo PR, told PRWeek: "It costs roughly six figures to get an individual GBWR player to the Tokyo games, so any help filling the funding black hole would be hugely appreciated."
GBWR ambassador and England rugby team fullback Mike Brown, who is spearheading the campaign, said the funding is "absolutely vital".
"I appeal to everyone to help in any way they can and to help secure the future of GBWR," Brown said.
As part of the brief, Dynamo is calling on sports people, PRs and influencers to help the agency raise funds via the #saveGBWR hashtag and its funding page.
Bowles said: "We also want to bring on new sponsors to help the team, including airlines that are willing to help get the players to the 2020 Paralympics in Tokyo and any brands that want to sponsor players or their wheelchairs."
Bowles also confirmed that an appeal for funding would be made during this weekend's Six Nations clash between England and Scotland.
Speaking to PRWeek last month Bowles, whose "close personal friend" Jonny Coggan plays for the GBWR team, said it was the only Paralympic sport to have its funding cut in full.
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