Spare tire mounting

Getting ready to install a spare tire on my trailer, SUPRA uses boatmate trailers. I saw the other day someone had there spare mounted on the front crossmember of the trailer under the front of the boat facing upward which I thought was a great idea. Keeps the tire out of the way and hidden.

Unfortunately, I did not take a closer look on what bracket they were using. I have hunted around on the internet and found nothing that mounts the spare in this location. Anyone else have a picure of there spare tire mounted like this? or know where they are selling brackets for this location? I have heard of problems with side mounts and clearance issues when loading and unloading the boat.

Thanks...