Update
Because I'm American, and all the people I was expecting to game with were likewise Americans, we were converting to a monetary system that we understand. Heck, it took them several hundred years, but the British finally converted to a decimal system.
So, the Funds are in dollars, and we have expanded and coherent equipment lists that I had expected to get added to the board. It's just taking way longer than I was expecting... to convert the tables to something useful in RPoL.
But, for the time being, if you have the books, just convert dollars to pounds/shillings and buy equipment from the book.
Otherwise, you can just select equipment you'd think is reasonable for your character.