Soundfont percussion sounds

I'm using TimGM6mb.sf2 and I am generally happy with it except for some of the unpitched percussion sounds.

I've tried others as well but I haven't found one where I liked all the drum sounds. Can anyone recommend a soundfont that might have better unpitched percussion samples (drum set)?

Or is there a way to replace those sounds in my current soundfont? (If there is, I would need step-by-step instructions.)