Don't forget that for orders from the EU/UK you don't need to pay the VAT. That coupled with (usually) cheaper postage can often make buying from the UK cheaper than buying from the US. Try Silverprint and Retrophotographic, especially for the Ilford film.

Having said that, I have been getting stuff along with a friend through B&H.

I've been mixing my own developer (PC-TEA), sourcing the TEA and Vitamin C locally, but getting the Phenidone sent from the US. Works out way cheaper than buying locally.