My house, built in 1959, has a sliding door with no internal latch or lock mechanism or space for one. I'd like to replace the current "handle" (a bolt with nuts). Are there handles designed for a door like this? The simplest solution I have so far is to take two handles with identical mounting holes and put them on either side of the door, fastened with bolts and nuts. But a handle, and especially a handle with a lock, designed for this type of door would be great.