Hello,
The adjustments and alignments for these bifold doors are done at the 21-048 bottom corner pivot. The photo of the top pin looks fine but the second photo of the bottom bi-fold door is missing the 21-058 guide pin. Once you install the pin and adjust the 21-048 pivot, the left side of the door should align with the right side. You can purchase a strip of wood to lower the top track so there is not so much space at the top of the doors if needed. Thanks for posting.
There is a groove in the threaded end of the 21-048. Once you loosen the nut located in the bottom stationary corner, use a slotted screwdriver to turn the pin clockwise to raise the door and counterclockwise to lower the door.
If the 21-058 is the only damaged or missing part, that is all you'll need to replace. Unforutnately, these parts are not available in a kit since each manufacturer chooses different combinations of parts to use for their doors.
We'd be happy to confirm if we carry any other parts for your closet but we'd need to know what else you need since these doors do not use one specific set of hardware.
As for the storm door hardware, it looks like you may have old-style Pella parts. Unforutnately, we do not carry a suitable replacement for the handle set. If you need the internal mortise lock, we would need to see yours fully removed from the door to compare to our inventory. Thank you.
We do not have instructions on this particular guide pin but take a look at the guides related on this page showing the general process to replace the pins on similar bi-fold doors.
Thanks for getting back to us but we'll also need to see the side of the mortise lock body to confirm if we carry a possible replacement. Please also write out the exact distance between the center of the installation holes since it's tough to make out measurements from photos.
Dies this help?
Here are some more pics.
That's exactly what we needed to see. Unfortunately, we do not carry a mortise lock that matches the spindle position shown in your photos. I'm sorry we won't be able to assist with this repair but please let us know if you have any other hardware questions.