This is a weird one, but i'm interested in seeing if anyone has a source for plastic water filled jersey barriers, for cheap.  The taller the better, the cheaper the better.  Minor leaks I'd be willing to attempt to patch on my own.

My old lady’s construction company gets them from traffic control companies:

 

http://www.trafficsafetyservice.com

https://www.trafficplan.com

 

maybe they have some rejects you could have

6 hours ago, Sota said:

This is a weird one, but i'm interested in seeing if anyone has a source for plastic water filled jersey barriers, for cheap.  The taller the better, the cheaper the better.  Minor leaks I'd be willing to attempt to patch on my own.

If this is a temporary thing, some places let you rent them as well.

The links shocker provided are probably your best bet.

United Rentals and those types of places are your best bet.  Heck, they might even have some old ones for sale.