design of wideband balun

is there any balun available in the market that can operate in the frequency range of 400 mhz-1000mhz

http://www.minicircuits.com/pdfs/JTX-2-10T.pdf

Hello,

I need a similar 4:1 balun for same bandwidth. I will connect it between the antenna and coax cable. So it shouldn't be smd like minicircuits sell. How can I find such a balun or how can I build it? What material should be used as core for those frequencies? Thanks