I have a friend with a 206-L4 who has a
Paravion Heliporter that he likes.
It seems to be very well built, albeit kinda expensive.
I DO NOT recommend anything from SkyPro in Jacksonville, FL. (they have classified ads under the name Bill Hay on Barnstormers) I bought a transporter from them in December, and after numerous delays (too many to count with some ridiculous excuses) I finally got the basic frame in April but not the adapters to fit my Enstrom F28. They claim the freight company lost them. I finally had to make the needed parts myself, and then had to replace all 6 wheels and tires (the cheap ones SkyPro used collapsed on the 2nd trip out of the hangar) and the rear drive axle snapped in less than 2 months of light use.
Lesson learned- I bought a cheap product and got what I paid for.