I looked at those Thunderhorn straps and they will work, and are actually a better quality strap.
I only use my Kanati for two blade heads, they just aren't big enough for my 160 Snuffers. Also after you fit the new Yoga block foam, measure it and mark it off for even head spacing and mark it plainly with a Sharpee so you can put the arrows back in the same each time without a bunch of fuss. It'll make your foam last a lot longer, one thing you'll notice about the yoga block replacement is how quiet it is. Most quiver foam sounds like crushing Styrofoam every time you move an arrow.