Half ton fenders? EBay or a big swapmeet. Or here. In the wanted section. Half-ton fenders are $$$. I know of no repops. Once you get past half-ton only stuff cabs, doors are much easier. Tailgates and windshield frames are just below fenders on the scarce list.
I have a windshield frame. It would be nice to find some fenders. Too bad nobodys poppin glass ones out of a mold.
Google some of the IHC forums. These trucks trucks are kinda hard to get parts for they have a lot of connections. Www.oldihc.org and Outback IHC parts 1-509-483-9062 Just what I can remember off the top of my head. Sent via Western Union Express
check craigs in states that have old farming communities northern states still a shitload of them out there
There is an old man in the Hannibal Quincy area that has IHC parts. When I find name and number I will post it for you.
McMillan Cash & Carry(Owen Sound On.) was making fibreglass fenders a few years back...they don't list them anymore. Not too hard to find fenders once you get looking as the K models were built from 41 to 49 but if you're in big hurry slide by and you can have this set cheap.
He is on market st in Hannibal don't call because he is hard of hearing. He is an old race car driver.