Gloves
Scout Troopers are bikers, that means they have biker gloves: padded fingers, long forearm section.
You can make your own following a few guidelines: black leather or immitation, 4 padded ribs across the back of the hand, suede padding over the thumb and first two fingers, V-slit on top of the forearm. The ones worn on screen were made by Esprit and got discontinued soon after.
However, you can buy very accurate replicas on eBay. These are the ones I got for a cheap price.
They come in S, M, L or XL. These are Smalls since I have tiny hands. They take a while to wear on ya but I recommend them.
Undersuit/Flightsuit and Cummerbund
The hardest aspect of the Scout, despite appearances, lies with the elements you don't see: the undersuit or "flightsuit", the cummerbund or "diaper" and the pouches. You can commission these pieces from excellent tailors who are also fans and cosplayers. Look around Bikerscout.net to find out who.
The flightsuit is basically black coveralls with no pouches, no zippers (aside from the middle zipper to put it on) and no buttons. The collar section closes up with a short velcro strap.
* Here comes the weird parts: the inner leg area or "saddle" is made of black suede. It has two black elastic strapping going around outside each thigh.
* Over the shoulders there is a short-sleeved vest with ribbing. You can make your own vest to wear over your flightsuit, which is not recommended if you live in a warm and humid climate, but doing so will make your costume super screen accurate for Lancer status. Detachment leaders will look at this for approval:
* There is a black suede "back flap" which hides the butt area. You can see it here:
The cummerbund is a separate piece that you wear over your flightsuit. It's made of white or off-white cotton with a "codpiece" and two pouches. You need 7 sewed lines in the middle, not ribs, and it needs to be filled in otherwise it'll have too many wrinkles.
Fill the pouches with foam and make them look as good as you can. Not too fat and not too thin. I adjusted the width of the bund and reduced the length of the groin piece so that it wouldn't stick out so much.
And of course, don't forget your balaclava.
Your chin/neck should not show when you're there trooping, or doing whatever. Make sure you're wearing something made of polyesther or spandex in order to keep you fresh within the confines of your helmet. I'm wearing a "under armour" type of balaclava which opens up to leave my face free if I want a sip of water.