router table to fit Black and Decker router

Welcome to the forum.

Most often the screw pattern/spacing can be an issue. It's very unlikely that a table would list compatibility with an older router like that. If you measure between your plate screws and then measure the spacing on a table in the store, you should be able to tell if it will mount in existing holes. Or even easier, take your base-plate off and bring it to the store to compare.

I used a router similar to that for years to cut plexi for signs.

I just noticed a post about a Bosch table with a Ryobi router. He mentions another pattern of holes besides the plate ones which worked for him. Perhaps your router has more than one set too. They're usually in a triangle or rectangle pattern.

I also have the 7614 (3 of them for over 20 years). IF you put this router in a table, I strongly suggest you drill out (all the way through the frame) and re-tap the mounting screws to the next size up. As it is now, three small screws with very few threads is all that will hold it in the table. (just something to think about when you do find a compatible table).