Thanks! Yeah, the reflective tape works great since, in concept, it's very similar to the gaffer tape they used on the original costumes.
Trying to recreate the intricate circuitry on Tron's helmet, for example, with El tape or el wire is just simply impossible if you want an accurate costume.
----
Quick update, so I got some boots and a belt on the way. The belt was confusing me for a long time but I finally ID'd it as a police belt. The vast majority of them that are available for sale are in black, so I'm assuming that the prop people must've painted the belts and handcuff holsters, along with the motorcycle boots. Fortunately, I found a Polish white police belt that will work perfectly!
As for the boots, I really want to get real motorcycle police boots, but those are just too expensive for my price range and also, painting them white is too risky and probably won't last long so I decided to get some costume white boots on eBay that should do the trick. The boots are a really minor part of the costume so it shouldn't be too much of a problem.