Other than the single non-airworthy XC-99 there is nothing that looks like a B-36. None of the museum-resident B-36s are airworthy, as you have learned.
I think there are still one or two Shorts Belfast large turboprop freighters that make it to the States occasionally. Still, they don't look anything like a B-36.
All I can offer up is a story I wrote about the B-36s that I saw when I was young. If interested, you or your dad can check it out here: