From my own notes and hours of prospecting, checking for various stuff, the following may be useful to you. Remember that stuff is rare and these may not be the best planets to search on, but it will provide a starting point. These systems are all close to the newbie system and easy access.
Antinomy - Niobium - Arsenic - Selenium - Calor A 6
Vanadium - Zeta Aquilia A 1
Yttrium - Germanium - Zeta Aquilia A 2
Kitty