You sound almost as if you're about to make the horiffic mistake of spending sums of money to put your name on the list as a purchaser of chemicals...
So... you need a decently-boiling ketone?
Ever hear of tansy?
Its oil is about 77% thujone. Sure, it boils kinda right-at-the-line - about 201c, if I recall correctly - but I can assure you from whatever-personal-experiences-are-lawful that, if ya just toss a little oil of tanacetum into a pot filled with peanut oil & tryptophan, stick the lid on, and try-oh-try not to let the thing burst into flames, it'll work at *least* semi-decently.
BTW...
...how much did you pay for your tryptophan? Too much?
Grab 5lbs of sunflower seeds.
Make a "giant cauldron-full-of-tea"
Pour yourself a glass. Don't drink it, because excessive tryptophan intake can have severe side effects (I had no idea where I was, or whether I was masturbating... don't.) Crash out the tryptophan with about twice the liquid volume of acetone.
::shrug:: Ghetto - but it works.
Oh, btw... if tanacetum ain't in your area - sage is about 70%. Point a fuckin' search engine at 'wid for refs... NIH in origin, I think, there archived... but fuck I'm senile... so who knows. *You* check.
Peace.