Son is a lefty wants to play bass in school

My son is a southpaw and wants to play double bass in 4th grade orchestra. What are his options?
What do leftys do? Do they just learn to play(bow, pluck) with their right hands? He took guitar lessons for awhile and played a left-handed guitar. It doesnt appear that anybody rents left-handed basses and if we want him to play true lefty, will involve purchasing a junior Englehardt left handed model. $$$. Any leftys out there?