New feet?

My Dell Inspiron desktop from 2009 has 2 swing-out rear stability feet. They have broken, and I have to do a balance dance to get the thing to turn on and STAY on.  Can I buy new feet?  Can I just yank both of them off, and see what happens?  Can I yank them off and experiment with thicknesses of cardboard, like a rickety restaurant chair?  Sounds idiotic, I know - but dropping a heavy book in the same room is sometimes enough for it to crash.  Not ready to replace this - still runs fine - unless you drop a book, or bump the desk with your toe.  Thanks.