wheres the best place to get a new 40watt laser tube?

wheres the best place to get a new 40watt laser tube?
I am in the US.

My water pump that came with the laser quit running while running the laser. We heard a pop noise and went to investigate and found water leaking out of the tube and the pump not running.
Have less than a hour on this.

What is a recommended pump to go with other than the supplied pump?
I have contacted the seller and see what they will do, since the supplied pump quit working.

LIGHT OBJECTS SELLS THEM

Tube cost just about what I payed for the hole laser.

True - but it is supposed to be a better tube - might be an opportunity to upgrade to the 50W

I bought from these guys, very good quality tube, packaged in a wood box. Had it with me in the than 5 days 700mmx50mm 40W CO2 laser tube warranty 3 monthes 2500-3000 Hours life span for 40W CO2 engraving/rubber stamp machine plotter
http://s.aliexpress.com/U73iI7V3
(from AliExpress Android)

looks like the ebay seller is going to send me a replacement tube. see how long it takes.

@John_Austin ​ please ask them how are they packing it. This are very very fragile