I'm glad your engine still has its original fuel pump. Brand new ones are junk straight from China and frequently don't even work right out of the box. This is true with a lot of modern replacement parts so repairing originals is often the best course of action.
Your existing one can be rebuilt or you can do it yourself. I had Then And Now Automotive do mine for about $100. The kit to do it yourself is $60.
Then and Now Automotive781-335-8860
Just a word of caution as you begin your restoration process. NEVER throw away any part regardless of how badly damaged, rusted, broken, or deteriorated until you have the replacement installed and verified to be functioning properly.