R82 pony walker for little Harry

Hello. My name is Luisa Stevens. My son Harry has cerebral palsy which effects his mobility. We're desperately trying to get him a R82 pony walker in the hope that it will help him to gain some independence and move around himself. The R82 pony walker specifically is perfect as it is light weight, supports his trunk and hips, and has the section between the legs to prevent him from crossing over his feet. Physio are not able to supply this type of walker anymore though we're able to get one for us to try on Harry. They are available to buy on the US website for almost 3000 including delivery. Any help we get towards being able to purchase this walker for Harry would really be so grateful.