I am trying to find a li-power supply converter for my sons's li-power wheelchair. It was purchased from Odet (UK) Ltd about 3 years ago in the UK. The battery charger no longer works and my son cannot use his wheelchair. It's a AC DC Converter model no ACK 28 DC Output 29.4V 2.0A. If you could please advise me if it is possible to purchase this through yourselves it would be much appreciated as I am extremely anxious to find one so my son can continue enjoying his independence and freedom of his electric wheelchair. Thanking You for your help in this matter please advise asap.