Depends which decade you go for. Peep toe shoes will work for both.
40s - pencil skirt, puff or capped sleeve blouse, seamed stockings, peep toe shoes. Or a tea dress.
50s - pencil skirt, capri pants, halter neck top or gypsy top (polka dots or leopard print always work well, circle skirt or dress, or sarong style dress, your peep toe shoes again!
You can get inspiration from online shops such as Tara Starlet, Vivien of Holloway, Heyday Clothing, Dolly Dagger to name a few.