I would clean the original bolts and re-use them.
Soak them for a few days in Mineral spirits to remove the grease, let them dry overnight on a paper towel.
Soak in evapo-rust for a day or so, rinse with water.
If I can find them lol last year when I had to move all my stuff things got misplaced and boxed up I have no idea what is in what box. I will go thru them and see what I can find