Teardrops n Tiny Travel Trailers

I've bought these mount rails from Vintek but they are out of stock. Does anyone know of any alternate source?

I found one recently. Now let me try and find it again.

Here is one, but not the one I recall. Will continue to check.
http://www.amazon.com/Patrick-Metals-16 ... PDKIKX0DER

And another.
http://www.dyersonline.com/ap-products- ... pport.html

And this is the one I recalled seeing before.
http://www.rvwholesalers.com/parts/prod ... hgodsoEICg

Please share with me which you went with as I want to order two myself.

Thanks. It was for a friend. I believe he'll buy it from amazon as he's a big amazon customer.