Thanks for your thoughts, guys.
I didn't even consider Lindberg, as their PT kits, both the 1/64th and the 1/32nd scale ones, have long been known for their fair-to-middling (some say crude) quality and inaccuracies.
As I said in my post, my interest is in the (mostly second-series) 77' Elco PTs, not the 78' Higgins boats (with all due respect to those boats and the men who crewed them). Revell put out a (not very good) 78' Higgins PT kit in the '50's, which was recently reissued. There has
never been a plastic model kit of an Elco 77' PT boat, as far as I know.
77' Elcos (of both the first and second series), along with the early 80' Elco boats, were the PTs that faced the big-ship Imperial Japanese Navy around Guadalcanal in the fall of '42 and winter of '43. Had those PTs not been hampered by their lousy WWI-era Mark VIII torpedoes, "Ironbottom Bay" would certainly have swallowed a lot more IJN tonnage.
I thought a 1/72nd scale, two-in-one "custom kit" PT 59 stock boat/gunboat idea, as a companion to the classic Revell 1/72nd scale "PT 109," would fire the imagination, but apparently not.