Doormat - you can't get an injuction unless you are prepared to press charges. Been there - tried that!!
U, really proud that you have made a decision, I know that its been really hard for you. You can't however keep him out, if the house is in joint names he has to have access at all times. If he is locked out he can use 'reasonable force' to gain entry and has to make good any damage he has done. Sorry to be the bearer of bad tidings but as you know I'm quite up on these things with my recent experiences!!
If you want to find somewhere for him to go and I think that is so reasonable of you, look in the yellow pages under letting agents and phone them for info, but I think that you will find that most of them do 6 month leases only. Could he stay with a freind/relative?
You've done really well, so pleased that you have decided what to do and I think the two week thing is a good idea.