Can you replace all brands and styles of mutlipoint lock systems?

I have some doors with locks that latch at three different points - but can't find any markings or brand names? Can you help me?

Sure .. we handle all brands and a number of styles of these "mutlipoint locking systems" Hardware. Please start by completeing our Multi Point Questionnaire. 
MASTER MULTIPOINT LOCK SYSTEM PARTS ID GUIDE [PDF] - http://tinyurl.com/p4geg29

I'm looking for a multipoint casement window lock system and found your website with what looks like what I'm looking for? Mine is approximately 4 5/8" x 3/4" and inserts into the window. Can I send you some pics to show what I have?

Sure .. we handle all brands and styles of mutlipoint window locking systems hardware for brands like Marvin, Pella, Andersen, BiltBest and others. Please provide as much information as you have. Send all digital PICS and Inquiry to: Info@WeFixItUSA.com