It's interesting to read this thread again, as when it first appeared, I looked for one of the calenders for myself, so that I too could have a go at assembling the small TLR. But at the time I could not find one.
But, one of my Christmas presents this December 2019, was a Haynes kit version, with Haynes being most well known in the UK, for their manuals to fix motorcars.
I will be opening it soon, setting aside a free afternoon to assemble it.
I love the low tech look of the these types of cameras, and am sure it will provide me with a fun project, both to assemble and use it.
I will report back, as and when it has all been done.
Terry S