Hi and welcome to mightyram. I believe there are 're-skins' available for stock seats (Gen 1 trucks) but not so sure about Gen 2's. You can buy off the shelf seat covers but they won't be tailor made for the Mighty Max/Ram50/D50 specifically. Ebay is your friend here. As for the sun visors you will need to go JY hunting for a replacement. I highly doubt there is any OEM new/old stock available anywhere. Posting pics is easy once you get the hang of it. Here is a run down -

Click on "Go Advanced" which is under the post text window, then scroll down the screen to "Manage Attachments" and click on that. A file manager menu box will pop up with a green plus sign "Add files". This will give you options of either downloading from a site/URL or from your own source (PC, laptop etc). Select the source file and upload it then it will appear in both the album box and in the bottom "Attachments" box. Once you have your file ready to add to your post uploaded then click on "Done" and it'll automatically put it in the post you're working on. If you don't use an uploaded file within an hour (I think...) the file is scrapped from the album folder.