You can easily and cheaply find YAGI antennae in VHF band everywhere (TV shop) , usually they have a larger bandwidth i.e. 100 ..200 Mhz for 12 db gain you probably need something like 10..12 elements (directors).But all this can quickly be looked up on the web. You may also do a calculation your self using the antenna module in AMANOGAWA (free). Dont forget to use a preamp very close tot he antenna.