A Czech clinic has offered to fly British brain tumour patient Ashya King and his parents to Prague for proton therapy treatment.
The couple had taken him out of a Southampton hospital without doctors' consent a week ago as they wanted him to undergo the technique that was not available for him on the British National Health Service (NHS).
The family went to Spain where the pair have a property and apparently planned to sell it to pay for the therapy which costs tens of thousands of euro.
They were detained under a Europe arrest warrant issued by the UK which was later withdrawn.
The couple were freed from prison on Tuesday night after British authorities abandoned their attempts to extradite them, amid a public backlash, and the trio were later reunited in a Malaga hospital.
Ashya (5), who has been made a ward of court, cannot be moved without the permission of a judge in the UK.
But if the judge rules he can be taken to Prague, the Czech Proton Therapy Centre said they would help transport him.
Spokeswoman Iva Tatounova said: "We have a private jet ready when needed to transfer Ashya to Prague from Spain. We were asked by Spanish and UK specialists if we are ready and how the transportation will be provided."
"We told them we are ready and we can arrange it. If the court allows it and the parents agree with the treatment we can transport them here."
The centre claimed it had been sent Ashya's medical records and believed the technique was suitable for him.
A fundraising page set up to help pay for the treatment has so far raised more than stg£41,000 (€51,616), while charity Kids'n'Cancer UK said they have agreed to pay the stg£100,000 (€125,894) needed for Ashya's treatment, plus living costs, after donors pledged stg£35,000 (€44,063) in 24 hours.
It is believed a High Court judge may rule on the legal status of the boy before a formal hearing on Monday - if all sides can agree to the next steps.
Ashya's father Brett King had hit out at the treatment they have received since they removed him from Southampton, saying they had been "treated like terrorists".
He claimed he had previously informed the hospital about his plans to seek proton beam therapy for his son - which he said was not available to him on the NHS.
But he said he kept the date he intended to take him secret, for fear he would be stopped.
Southampton General Hospital said the family had made it clear they would like to take Ashya to Prague, but the hospital had no idea the family had planned to leave.
Dr Peter Wilson, chief paediatrician, said the family were not keen on parts of the treatment which had been suggested, and that there were discussions about different forms of treatment.
He added the hospital had "absolutely not" threatened Mr and Mrs King with an order which would have taken away their right to make decisions about their son's care.
