Look on Craigslist. Call local boat dealers.

Dual axle trailer! Up to 18 ft. Great Condition! 1200 obo! MAKE OFFER! - boat parts - by owner - marine sale


2018 17 Ft. Single Axle Boat Trailer - boat parts - by owner - marine sale

Depending on your price range, and how far you want drive, I'm sure the above links would work - or you could make them work.