The tiger striped wood is very attractive, the shroud is easily and cheaply replaced, the sling is another matter, I would just go for a reproduction of any south american sling that would fit.
As far as parts go, I would check sarcoinc.com or libertytreecollectors.com, there many more, that's just two off the top of my head. Not sure how to deal with that cross bolt with out staining
or damaging the wood, I'm sure others with more knowledge will chime in. Good Luck!!