Need replacement handle and keeper

I have a Pella sliding glass door and screen.  I want to replace the handle on the sliding screen door.  When the install was done they never put the L-shaped keeper on the door so we've never been able to latch the screen door.  I'd like to replace the handle and get a keeper to mount.  I'm not opposed to having a new handle that is different than what we have, just need it to be white.  I want to be able to latch it/lock it when needed.  The space where the keeper would go is 1/2'' wide.