I did extensive research before getting mine custom made, but of all the mass manufactured models, the Feherguard is highly recommended, there was another manufacturer that made good quality ones near us, but I found out they were quite local and only available nearby.
The reason I had mine custom made was the construction of it was impecable, probably 5 times stronger than any other ones I saw, I have a 30 foot diameter pool and needed a strong pole that would not sag, which is hard to find, and it was half the price everything included where with the others, I still had to install posts to get it to the right height and adapt all sorts of harware, increasing the cost even more.