Go to www.perryboat.com THEN follow link to "Robert Perry Bio" for the list of his ''acknowledged'' designs. The ONLY 42 footer listed is the Valiant 42.
Tayanas have only been built by TaYang Yacht Builders in Taiwan. www.tayanayachts.com
There many Robert Perry ''knockoffs'' (stolen designs, etc. ?) built at yards that dont have good reputations or understanding of proper yacht building - be very careful.
If you want direct contact with Bob Perry go to his website and engage his ''consulting services'' (for any impending purchase of any design - for a fee).
ok, so I now know even less than I thought I didn''t know.
It looks like Bob Perry checks out as the designer, though. I went to his site and his bio therein, as you suggested, and the tatoosh 42 and 51 are listed. No sign of the mystery boat, however, at the Ta Yang Yacht Builder site.