If it's a game that you're enjoying and would play repeatedly, I'd say buy a "real copy". We're a board game family, and we definitely get our money's worth from our favorites. If the game is no longer being manufactured, try ebay -- it'll pop up eventually.
If you're sticking with the homemade version, you can buy replacement items as another poster said, but tread lightly: Those things are very expensive! Recently I decided I wanted to buy an extra bag of "gold tokens" for a game we've been playing intensely since last Christmas. If memory serves, a bag of 25 or 30 tokens was $4.95 plus shipping. I considered setting aside all our gold tokens and replacing them with pennies . . . but, no, the tokens are fun, and it's something we play multiple times a week. In the end, I searched on ebay 'til I found a very used edition of the game -- and I threw away the box, boards, cards . . . and I just kept the tokes. It ended up costing less than $5, including shipping.
Similarly, I recently saw a cool desk top -- actual desk, not a computer -- on Pinterest, and I'm interested in making it: The desk top is covered in Scrabble tiles and covered with a piece of glass. I've learned that you can buy Scrabble tiles, but they are $$$$$$ . . . so I'm slowly buying Scrabble games at yard sales and Goodwill, tossing the boards and just keeping the tiles. It'll take me a while to get all I need, but this is a fun project, not a household necessity.