Help finding part

Looking for a direct replacement for patio door hardware. I assume it falls under the heading of 'sliding door - mortised lock'. I've seen similar parts on your site but am having difficulty finding one that I know will work. Please help!!!

Thanks. I put it on order. We'll let you know how it works out. For the record, I like how your site linked me directly to the door handle also. Sweet. You just upsold me! Why shouldn't I replace that old rusty door handle too...