Muncie 3 speed manual, model 318

[GPurdy]

Greetings gentlemen,

I am restarting a project I have had mothballed for 15 years now and finding parts is a little more difficult. I have 1958 Apache 1/2 ton custom cab deluxe. I am putting a 350 (60 over) in and I wanted to keep the interior stock and use the three speed column shift.
After taking my tranny to the shop for rebuild I got box of parts (disassembled) back with a note saying "Not worth the effort". So, now I need to find another Muncie 318 3 speed or a bolt on replacement that won't require me to modify the linkages.
I am not opposed to rebuilding the one I have if I can find a good source for parts and a service guide.
Any suggestions on parts, rebuild guide for the 318, or a compatible bolt in replacement for the 318 would be much appreciated.