Reddit mentions of ProForce Combination Cloth Shin / Instep Guards - Black - Small,#84970

I'd suggest buying some cheap cloth kick-pads and grabbing some kickpad covers from elucha.com; you'll get a pretty good look for under $50.

Regarding kickpads from elucha.com, I've owned two pairs: the ones I have now, which are pretty good but they don't sell anymore, and a pair of their typical solid black kickpads that had the fabric tear pretty easily (when I lent them to someone else! So they could have easily just been careless with them), but anyway, it's a small enough investment to try out the covers and the cheap cloth kickpads because you can always use the covers later - I used the cloth kickpads for about a year when I was working once a week (9 or so years ago) and they are durable as hell especially for the price.

Like Giraffasauras_Rexis said, you should take functionality into it as well - I use kickpads occasionally, but it's purely aesthetic as I never kick with my shin, so people watching carefully might find it a nonsensical choice on my part. Lately I've been preferring just my boots, and I'm pretty sure I have the same pair of costume boots you're talking about :D