Hey Wierd one,
I think we have a thread that covers this, but I would always recomend
Advance Guard Militaria
Age of Kings
Jeff and Ane at AGM are great people, while their prices sometimes seem high, and their on-line catalogue requires a quick action, I have always been able to look back on something that I passed up in an old catalogue becaues I thiught it was too high, and realize that if I could buy it now for the same price I would jump at it (and I am talking about a 6 month old catalogue)
Randy and Remy at AoK are also great people, they are always willing to help even if they are always fighting over who is wearing the same shirt at SOS.
They are members on the forum and both businesses stand behind their goods, there are other good online sellers, but I have not had dealings with them.
I think others will jump in with other recomendations
Best
Gsu