Hi everyone, I am new to mumsnet. I was wondering if anyone know of where I could get a cheap harness for the Britax Adventure that I have just bought. My 4 year old has been diaganosed with autism and we need to keep him in a harness car seat rather than the car seat belt as he would just get out, especially when he is distressed. Websites I have looked at for car seats for special needs are really expensive, why do these companies take advantage and charge the earth its really unfair. I got the car seat today from Argos for £39.99 as it was on special from £89.99. I want to keep cost down and I dont want to pay £90 for a harness.