AndrewG:
http://www.snoopers.co.uk/product/laserstar-pro-eliteThis works brilliantly, a bit expensive and no doubt its possible to get fined for having it (location dependant) but you’ll never have points on your licence. Hard wired in and covertly installed its invisible…
I’ve, did have 
the earlier version of that, I believe they do open garage doors very well.
Also you might need 2 on a hgv, because the target area is so large.