I'm putting together a Panzer Uniform, I also have a Camo smock. I go through Spearhead Militia on Ebay. Here is the site.
http://stores.ebay.ca/Spearhead-Militaria
This guy has an excellent stock backed by great track record.
To give you a bit of choice here are a few others, though I don't know anything about their bussiness practics. I would assume they are good though.
http://www.packrat-toyz.com/Re-enact...wii_german.htm
http://www.1944militaria.com/
http://search.ebay.ca/_W0QQfrtsZ0QQf...anzerfaust1943
http://stores.ebay.ca/cuttonmare-ARMY-store
http://search.ebay.com/_W0QQsassZkeith7524fnl
For insignia here's a good site. Thoough I have not done bussiness with this company yet so can not tell you how good they are.
http://www.militarytour.com/reproduc...niformrepo.htm
Hope that helps you out.
JW