Old angle valve rebuild kit?

I have several old brass angle valves that leak at the stem packing and where the bonnet fits to the body. I am unable to find a source for a rebuild kit. These valves are 1" & !-1/4", probably made in the 1950's. HL Gee, Buckner, & Thompson are on some of the valves. Goggle hasn't helped me locate a source.

Anyone know of a source to get a rebuild kit? I struck out locally.

Thanks, Jon