Re: replacement case for 1956 conn 10M?
BAM, SKB, Reunion Blues, Gator, any many other current manufacturers all make hard and gig bag cases that will fit a 10M very well. Take a look at WWBW, Junkdude, Musician's Friend, etc. for the availble cases and prices.
They aren't hard to find, it would mainly depend on how much protection you think you need, and how much you are willing to pay for it. Cheers.