bcaborin, the post is pretty old but in case you haven't tried that yet. Please have a look at Bukovina Society of Americas website there was a lady looking recently for Toma relatives from Boian as well. Not sure if you are from the same Toma family branch, but you could be, another good idea would be to get in touch with Romanian Pioneer Museum of Boian in Alberta http://www.boianalbertamuseum.com/
they have a listing with the last names index of emigrants and there are several Toma on this link http://www.boianalbertamuseum.com/category/t/
or probably you could try to ask something on their facebook webpage https://www.facebook.com/boianalbertamuseum
If that doesn't work out drop me some lines to email@example.com
and I'll try to help you. I personally know some people fom Boian with a Toma last name. Good luck!