One thing that I noticed about the Rubies is that I ended up with a bit of taper to the bottom of the visor from how the mandibles sat after the shape up. I thinks its because the Rubies is so 'horse faced' out of the box. When you have that section pushed into the visor, the bottom naturally spreads out.
Here's a thread on the Rubies Boba that explains what to do to mod it, it'd be the same for Jango.
http://www.thedentedhelmet.com/showthread.php?t=16703
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And heres a thread for converting a resin Boba over to Jango:
http://www.thedentedhelmet.com/showthread.php?t=15989
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Also, this guy can probably provide you properly sized knee's and the cod. Just tell him how big you are so he knows what set of templates to use. He has great prices.
http://www.thedentedhelmet.com/showthread.php?t=13525
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Here's my own shameless eBay plug for a suit (if it will fit you):
http://cgi.ebay.com/Star-Wars-Jango...ryZ99970QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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Oh and if SGB's not on the list that newbie sent ya, he also makes vests that are fairly cheap. Here is his suit thread in case mine doesn't cut it for ya:
http://www.thedentedhelmet.com/showthread.php?t=14364
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Hope that helps, I'm sure that Newbie set ya straight on the gauntlets and JP... BTW, the stuff that I listed is not the only stuff out there, there are others that make the same things. I just listed the folks that I know are reliable from having dealt with them personally.
Good luck,
Shawn
EDIT-
Whoops... Just re-read what you wrote... I see that you have a suit, so disregard that part.