slider door handles white 2265 sash control patent 5125703 D340,398

The lock handle set might be 82-086 . Go over the dimensions to compare. I am afraid we don't sell dummy handles, you might be able to retrofit the 82-089 to the door for the dummy handle set. See what you think. 

The 82-086 is certainly the right replacement for the handle set. If you need the internal mortise lock, I think our 82-226 should do the trick. 

No, a handle with a 3-15/16" hole center spacing won't replace a handle with 3-7/8". However, I highly recommend that you triple check your measurements. I've never seen a 3-7/8" handle set before, especially in this style, whereas a 3-15/16" hole spacing is extremely common. It's good odds that your hole spacing actually measures 3-15/16".