FV1974

I bought a 325i Touring M Sport and I am looking for a rear mounted bike rack to carry two or three bikes. I have contacted BMW and told me the only solution is roof mounted. I have got a semi paralysed arm and lifting a bike high is difficult. I would like to have a rear mounted bike rack instead. I do not have a tow bar. Has anyone found a suitable bike rack which does work with the M Sport spoiler in the rear?