What is the opinion of Reddit about the
HUO JI E-Element PBT Double Shot Keycap Set – 12 Translucent Backlit Key Cap, Blue Metal Color for All Mechanical Keyboards with Key Puller?

i think if you email corsair they will send you one. or u can just look at amazon and get a clear keycap. something like https://www.amazon.com/Element-Injection-Backlit-Mechanical-Keyboards/dp/B01N78IBWC/ref=sr_1_12?s=pc&ie=UTF8&qid=1506490929&sr=1-12&keywords=keycap

https://www.amazon.com/Element-Orange-Doubleshot-PBT-Keycaps/dp/B01N78IBWC?th=1&psc=1

They have blue metal or orange pbt keycaps

Just what I found with 45 seconds of googling that’d be a good cheap option for you. There’s a lot out there.