No specific models; they rotate through on a quick clip anyway.
Length is your friend with the Brazilians. I haven't had much luck with the ones that are less than 12'. Again, there are some gems in the rough out there, but you'll better your odds by sticking with the larger rigs.
Any of these shops will sell you quality hammocks and there are a hundred more similar to them online. Those three are probably the ones I order Brazilian hammocks from the most often though and I've had good luck with them all in the past couple of years. Seaside rubbed me the wrong way once, but they've been fine lately.