As far as I can tell, high-res versions of these files don't exist. However, since a high-res version of the original stud.dat doesn't exist either, as far as I know, I assume you have already done something on your end. To combine your high-res studs with the logo from version 4, simply add the following line to the bottom of your existing high-res stud.dat:
1 16 0 -4 0 1 0 0 0 1 0 0 0 1 logo4.dat
1 16 0 -4 0 1 0 0 0 1 0 0 0 1 logo4.dat