I modified the Harbor Freight 1 ton Arbor Press as shown here https://pinside.com/pinball/forum/topic/which-arbor-press-to-modify-for-pinrestore-rivet-press-kit Someone made a baggy of parts for this conversion and the rivet dies/rivets were pretty cheap and easy to get.
If you want to ghetto rig something you can get a handheld rivet die and just support the cap of the rivet on a cement floor but ymmv.