chassis mounted motorcycle carrier

Hi,   first post for me on the site-  so here goes.

I recently aquired a 2005 Burstner A647 /2.8D Fiat/Ducato  with AlKo chassis,  We also have a Motorcycle Suzuki 800 -and coming in at 180 kgsit  is to heavy for any towbar mounted/fitted carriers ive seen so far.  Can anyone point me in direction/give advice on a suitable bike carrier ?

Andy