Tow Hooks are still out there to be had if you get lucky. I picked up a pair of hooks last fall at a swap meet for the outstanding price of $20. Marked "67-72 Chevy/GMC " laying in a pile of "stuff" on the floor. When I seen them I 'bout threw my shoulder out of place reaching for my wallet.
Also found a factory tach several years ago when parts hunting in a local yard for $15. No printed circut but the harness and lens and all the rest of the gauges were still in the bezel. Minus the gas gauge? Go figure ? Good finds are still to be had but have to be lucky and in the right place at the right time. Also helps to have a little extra cash to talk with when you go parts hunting. Keep lookin' !!