Tow bar (speedmaster)

Hi looking at the last new speedmaster (graphite) in the country but need to pull a trailer behind and just wondering if anybody out there has a tow bar fitted to their speedmaster looking for inspiration, I've managed to fabricate towbars on my last three bikes, yamaha dragstar 650 classic ,BMW 1150rt , and current bike yamaha fjr 1300a ,but the speedmaster looks quite difficult to find fixing point's to attach the towbar ,I absolutely love my FJR having kept it the longest of all bikes Seven years now and was going to replace it with another but having just bought a camper van I've built a trailer for the bike plus a Watsonia squires D10 trailer ,to tow behind the van for secondary transport when on site, and trying to load it on & off the trailer its a heavy bugger and im not getting any younger so looking for something more managable,I've pulled a trailer behind my bikes for some 35 years or more with my dog as passenger Mindy ,border collie (18yrs) & Abbey (bearded collie) 17 yrs and at this moment my 18mth old bearded collie Amber is the current passenger