There’s a guy on EBay that makes the bolts, washers, telescopic sleeves etc. Also provides the exact product number for the matching POLYURETHANE bushings. Ordered them myself and I’m very pleased. Also used a floor Jack to slightly lift the body up to break the old bushings free BUT most of mine were rotted off and the fronts are totally rotted out into the radiator support.
I don't know where you're from but, those bushings looked mint compared to the ones I'll be replacing on my 1994 project truck soon. Nearly 30 years of daily driving in the Salt belt has really done a number on them lol! The core support bushings and hardware on my truck aren't even there anymore, I can push down on the hood and the back of the cab lifts up because of how bad the rear cab mounts themselves are! I'll be replacing those too with new parts fabricated from 1/8" steel plate rather than oem style stamped sheet metal replacements.
I found them on ebay acutally. They are a polyurethane body mount set, it does not come with the bolts but it comes with the mounting sleeves. I reused all my stuff cause it wasn't rusty.