Mamas & Papas joolz

[AlmostPerfect]

Hi

I bought a mamas & papas joolz second hand on ebay. I was giving it a clean when the back wheel fell off, looking at it i noticed the ball bearings were missing from the metal tube that clips it into the pushchair frame. I found a shop that measured it up an bought some more, then discovered the metal bar inside, that pushes the balls in and out, was snapped. I cant find a replacement wheel anywhere. I've emailed Joolz but had no reply, i have phoned stockists of joolz but the pushchair has been discontinued. Does anyone know of any other pram wheels that will fit?