I have a costume I put together years ago that's pretty decent.
My hat is from the UK (possibly the brand mentioned, but I'd have to check), and I had to "bash" it myself (which looks pretty nice I think). I then wore it in a rainstorm, which shrunk it slightly and caused the "brim twist" everyone was/is after. A happy accident. The side bow is not the exact style used on screen, but the width and color are right so it's minor in my opinion. Mine is rabbit fur, not the desirable beaver fur (which probably wouldn't have shrunk in the rain).
My shirt is from Coyles. Not sure if he still offers it. Sizing is perfect but tails are short (as they were in the film), as pants were worn at the waist, not the hips, back when the movie takes place. (so the pants need to have a long outseam). Make sure you air dry your shirt after laundering, unless you want to make it a bit smaller.
My pants are some I found locally. Not the exact "pink" color, but the overall look, "drape" and weave look very good.
Pant belt is the old military one. I think it's dark brown for Raiders. (mine's the right color whatever it is) I had the same belt when I was in boy scouts!
Gun belt came from Coyles (I think) as did the holster. I wet formed my holster using an old Colt .357 that was my Dad's. I bagged the gun so no moisture touched it (it was restored by Colt) and let it sit overnight.
Whip is from a maker in Australia. I do not remember who. Might have been an eBay purchase. It's pretty sweet in any case.
Whip holder I think was from Coyles too. Not much to it, so not a big deal really.
My bag is the correct gas mask bag; leather strap may be from Coyles, or another seller. I don't remember now.
I had Alden boots but I destroyed them (and sold them destroyed on eBay). I have not replaced them yet. My Redwings hold up much better to my abuse, but not screen accurate of course.
Jacket is Wested, with modified details (based on screen caps from the time) and made in Horsehide, rather than lamb. I wanted my jacket to wear like iron, not cloth. I have "distressed" it (which is not easy on their horsehide!) and worn it quite a bit outside the costume. It looks great now, and still stiff as a board.
The pistol was not mentioned? I believe it was a Webley revolver for Raiders. I had planned to get a replica (I don't need a real one), but never got around to it. Plus it's generally safer to be "unarmed" around here in the dark anyway... Since the top flap covers the pistol anyway, it still looks acceptable, even empty.
It is a fun costume for sure, and everyone who sees it knows EXACTLY what character I am.