DEF Pressure Line

I have a 2015 International Prostar with a Cummins ISX15. I accidentally broke the connector for the DEF Pressure Line when removing it from the DEF dosing valve. To purchase the entire hose with the connector at the dealer cost around $300 for part number 3990139c1. On eBay I found a similar hose for only $79 that looks identical but with a different part number 4087789C1. Both hoses are made by Navistar. The only difference is the dealer is listed as a DEF Pressure Line, and the one on eBay is listed as a DEF Return Hose. Are these hoses interchangeable?

 

Thanks, you seem to know a lot about these hoses. I made the stupid mistake of breaking the plastic retaining clip that holds the pressure hose to the dozing valve. I can't seem to find that clip anywhere. The best I could find was that return hose on eBay with a similar clip. Do you think I could use the clip from that return hose on my pressure hose? Also, would you know where I can buy those clips?

 

Do you know where I can find this clip?

 

I measured the inside diameter for the DEF pressure line that connects from the pump to the dosing valve and it is 1/4". I then compared it to the other two DEF lines that connect from the tank to the pump. Those two lines are a little bigger at about 3/8" or 5/16" inside diameter not exactly sure since I measure it with a ruler, but they are definitely bigger than the pressure line which I am certain is 1/4". Those are the only three lines that carry DEF liquid and connect to the pump(Tank inlet port + Tank return port + Supply port to Dosing Valve) . Each has its own heating cables wrapped around them. That's all the three lines the DEF system comprises with the exception of one more line that looks like a hose but it's actually a conduit of some type where the other end has an electrical cable harness connected.