I found this, which is perfect in theory, but there are several issues with it:
* Because it's made for VX Ace, which uses a different tile size, the medium-sized pads would need to be resized. (The largest ones, which would've been 3x3 tiles in VX Ace, fit perfectly in 2x2 MV tiles.)
* I'm not sure if this is because it's made for VX Ace, but it doesn't mesh very well with the MV lilypads. I actually tried it out; even the largest one seems more pixellated than the MV RTP.
* The terms of service, according to the translation here, appear to be possibly incompatible with commercial use. I admit I'm a bit unsure on the meaning of "doujin" though; perhaps my work does fall under that category, I'm not sure.
I do own VX Ace since I got it from an RPGMaker bundle awhile ago (though I've never actually installed it), so that's not a problem by itself. I also own XP (from the same bundle) as well as MV and MZ.
The large pads would be intermingled with these autotiles form the MV RTP:
So, something in a similar style would be ideal.
Just in case I wasn't clear enough, I'm looking for a tilesheet, not "character" sprites (as the earlier link has both); and I am using MV.