Where can you get engine bolt kits for 73+ 400?

[WH23G3G]

I'm missing a lot of bolts for the accessories of my 400 engine in my 73. I've got the oil pan, and some intake, and valve cover bolts. I'm really not missing a lot just a few so if I could piece them out it might be cheaper than a $220 kit. I want OEM looking. RT Specialties shows a few that I need. But I've always had bad luck with them unless you're buying something for $1000 or more. I'm having most trouble finding the manifold end rail bolts and the oil pump mounting bolts. Year One is in my area but sometimes it's less to order it than get it from Year One.

[RD]

ARP sells them, check summit.