Edit: I've found the Videotron one is named: RUU_Glacier_Gingerbread_S_Videotron_CA_2.10.1530.1 _Radio_220.127.116.11_26.09.04.26_M_release_188466_si gned.exe
It's linked to from somebody's Dropbox on XDA, but there is no thread for it as far as I can tell. But maybe there is and it's just not coming up in searches?
The Mobilicity one is located at:
I don't know why this was so hard to find in searches... strange.