Homemade - When Spider-Man needed a costume and he didn't have one readily available...So what did he do? Lets find out:

Wrestler

Peter Parker's first costume, used in Amazing Fantasy #15, saw Peter used some sort of mask to cover his identity while trying to win the $100 prize money for staying in the ring three minutes with Crusher Hogan...After he won the money, he knew he had to create a costume and thus the Red & Blue/ Black classic costume was born.

Costume Shop

Spider-Man needed a costume and badly in Amazing Spider-Man #26 and he got one from a costume shop before battling the Crimemaster and the Green Goblin...It didn't quite fit as you can see!

Costume Shop II

Spider-Man's mask was taken off while battling Doctor Octopus in Amazing Spider-Man #113...The mask was later retrieved by Randy Robertson who later gave to his father Joe and it then got into the hands of J. Jonah Jameson at the Daily Bugle...Spidey needed a mask, so back to the costume shop he went where he found a Spider-Man mask  with no eye coverings...His eyes looked like someone penciled them in for that issue and #114 where he battled Hammerhead and he also wore an exo-skeleton formerly worn by Doc Ock.

Bag-Man

Amazing Spider-Man #258 is the issue where Spidey found out that the black costume was alive and alien in nature...It was also an issue where he didn't have a costume while it was being tested by Mister Fantastic, so with the help of the Human Torch, he had a temporary new one: A classic Fantastic Four costume with a brown paper bag for a "mask"...Of course, this costume didn't last very long at all until he adorn the ole paper bad once more in Spectacular Spider-Man #256

Black Scarlet Spider

In the middle of the Mark Of Kaine storyline, Peter used the remnants of his old Black costume to create a makeshift costume in Spider-Man #58...It looked like a combination of the Scarlet Spider costume and the Black costume.