Those things are pretty coarse, aren't they? Here's a few suggestions. If you know anyone with a milling machine it's no biggie to shave the sides of the front sight to make it thinner. That would be the easiest and more precise option. Lacking that the sight can be thinned down with a flat file. Use one with a safe edge (no teeth on the edges) so you don't get into the sight base while filing. Make two easy passes on one side and two on the other until you get to where you want to go. For the rear sight TC makes a nice peep that is mounted on the tang. Older Renegades came pre-drilled for mounting the sight. Newer ones require the drilling and tapping on a single hole. If you want something more traditional you can replace one or both sights with irons from Track or one of the other suppliers. Going that route means cutting a couple of dovetails if I'm remembering correctly that the Renegade sights are installed by screws. Again, the best way to cut dovetails is on a milling machine but the old time gunmakers did it with files. Finally, if you don't mind modern, Williams makes their Firesight to fit TC rifles.
There's probably other options that I haven't thought of. I'm sure others will have suggestions as well.
John