If we can get the resources to make it look as such while maintaining the QWERTY keyboard.

Although I doubt ponies have keyboards.

Maybe not, but what kind of input method can we use in place? Quill and parchment?

A book with a page of the qwerty keyboard.

I'm hoping a more fitting SCP for Applejack will get added sometime.

I know right! This is darn near close to it, but still no cigar.

What should 513 be? Vinyl?

Would Vinyl fit in the place of The Cowbell's -1 instance? I don't think she would...

Sorry Glitch, I forgot you'd already come up with the 513 replacement.

Did we get all the in-game SCP's?

Here's the list of in-game SCPs:

Hostile:
173 (Pinkie)
106 (Rainbow Dash)
049 (Rarity?)

Harmful:
008 (What've we got here?)
012 (Cutie Mark Crusaders' theme)
079 (Did we come to a consensus on Nightmare Moon or Discord?)
096 (Fluttershy)
294 (Applejack?)
895 (What've we got here?)
914 (Twilight Sparkle)
1025 (Perplexing Pony Plagues)

Harmless:
372 (Scootaloo)
500 (Zecora)
513 (Who was the actual item based on, Sweetie Belle again?)
682 (What've we got here?"
714 (Alicorn Amulet, but can this be revised or...?)
990 (Mare Do Well)

Joke:
420-J (I remember something about Lyra here?)
789-J (What've we got here?)
Anomalous Ducks (Parasprites)