The answer really should be no,
Although you may find it relatively easy to find an adult male, you do need to take into considerations that new purchases should be quarantined away from your existing collection for 3-6 months. By the time this quarantine is over, you will be entering the cooling/brumation period ready for next years mating.
Quarantine is very important, especially with a species like the corn snake which has a low tolerance to quite a few diseases.
IF you are buying from someone you know very well and trust their quarantine, you may be able to get away with it - but it's very late in the season for mating now, so you may be risking the females health for absolutely nothing anyway, as few corns will continue to breed this late in the year, unless cooled at an artificial season to encourage them to mate late.
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