Help! Can't find C5 1998 fuel line part - GM has discontinued...

[rfh928]

Hi...I was hoping that someone might be able to help me with info on locating a part for my 1998 C5 - GM part # 10413424, fuel feed RR hose with check valve. My check valve has given up, so fuel flows back into the tank rather than staying in the line. Because of this, have to crank the motor a few times before it starts up. Just replaced the fuel pump...not sure if this is what helped burn it out - but with the pump costing $850 + tax + labour (Canadian price...), I really don't want to take a chance to prematurely wear out the new one. GM apparently has discontinued this part, which sucks given that this is not a model where 95% of the cars have gone to the scrapyard by now.

GM schematic & part list is attached...it's part #33 on there.

Thanks for any help you can provide!

Robert