Hi there, as far as the Ostafin crest, I am thinking that perhaps Ostafin wasn't the original polish surname back in Poland. I have searched family crest sites and came up with nothing for Ostafin surname. All the records I have from the US all state Ostafin.
As for further information on Ostafins, I have a bunch of info. If you would like to share info, please contact me directly at firstname.lastname@example.org
I look forward to hearing from you.