Help needed in the UK: John Wilkes Booths Deringer

Hi Guys. I'm having difficulty finding an accurate Derringer pistol for my National Treasure collection in the UK. With the strict import laws, I am unable to import from across the pond and the ones I am finding over hear are just not accurate enough.

He is the one from Wiki.....



And these are the type I am finding over here.....

Baby Philadelphia Derringer pistol

Relics - selling Henry Deringer Philidelphia pattern nationwide

Deringer Pistol Philidelphia USA 1850 - G1018 - Hand Guns - Western

As you can see, they just don't cut the mustard so any help would be appreciated

Thanking you kindly

Paul :thumbsup