They are out there, sparingly.
Not nearly as robust as the 10 inch scale guitars which I guess are 1/4 scale. In 10 inch you can get a replica of every guitar ever made adm every variation every rock star ever had.
I was able to pull together a Beatles set with the options out there. An eBay member named unclefat sold some great looking stringed wooden 1/6 guitars that I was able to modify into my needs. I got Paul's Hofner Bass all set and ready to go as is and was able to use other options to pretty convincingly alter into George's gretsch and johns casino.
But it took endless hours of work. There really needs to be a greater selection of 1/6 guitars out there