What makes you stuff better than the stuff already selling in the USA? Price? Quality? Features? A combination of all three?
It is hard selling in the USA, I stopped over a year a go. Had to work twice as hard for half the profit (USD/GBP). Plus I had the upkeep of an office in MN.
My advice to you is to email some B&M and online retailers with the info and of course the selling points. Then follow up with a call and offer free stock (yes free!) or at a very minimum a free sample.
Personally I'd concentrate cracking the UK first.