@Dr-Sassi Thanks ever so much Dr Sassi,
Unfortunately there's much more to the full model (I just cut this one piece out to make it easier to show) otherwise I would have just modelled it. Fortunately I was eventually able to contact the creator and get a better version, phew! Thanks for the link about importing, I will give this a good read as I often get models and CAD files sent to me so this is an area I need to look into more
Kind Regards
David