Insert bearings.... Does anyone have them?

I spent the day tearing apart the engine of my 29 Royal 8 and was very surprised by two things. The absurd fact that the rods don't fit through the cylinder bores and that the engine has insert bearings on the mains. Wow, what a difficult beast to dismantle (and later, assemble) being that the pistons have to come out towards the crank. Do any of you know whether the rod bearings are babbit or insert and whether any parts supplier has any of the laying around. I'm also in need of valves.