I was browsing through Rhodiums web page and found this. It is one of many procedures for p2p . It uses sulfuric acid and 2-Phenyl-propanal (hydratropic aldehyde). I got this idea from jackholes post off of wd; However, no one could seem to substantiate the claim that hydratropic aldehyde is in fact unwatched and used substaintaly in the perfume industry. Well here is the link from Rhodium and part of the post. Not the method you inquired about but possibley easier.
https://www.thevespiary.org/rhodium/Rhodium/chemistry/p2p.2pp.html
9 g of 2-phenylpropanal is slowly added with good stirring during 35 minutes to 40ml concentrated sulfuric acid, while the temperature of the reaction mixture is kept at -16f. After all the 2-phenylpropanal has been added, the mixture is allowed to stand at the same temperature for another 15 minutes, and then the mixture is poured onto crushed ice (100-150g is probably a suitable amount). When the ice has melted, the organics are extracted from the water phase by 3x50ml diethyl ether, the pooled organic phases dried over MgSO4, the ether distilled off and finally the residue is vacuum distilled (bp 91-96f at 11 mmHg) to give 5.6g (62%) of phenyl-2-propanone.