polyurethane cab mounts

[jsteppe]

Hello I have a 1981 k10 that I would like to put new polyurethane cab mounts on. The old rubber ones are crushed and falling apart. The problem is I can't seem to find a set that comes with bolts. Does anyone know what size and thread bolts I need ? I was hoping to get all the parts before I tear into my truck because I want to be able to drive it. I don't want my truck sitting there unusable because I'm waiting on bolts. As soon as I figure out how I will post some pics. Thanks for any help.