where to buy a Fuel pump check valve?

Folks, I have the problem of starting the car (1.8 8v GTI) when warm, just spins over but wont fire, unless you keep foot to floor and eventually it goes.  No problem at all when cold.
So been reading and it seems the Fuel pump check Valve could well be my culprit, but I cant seem to find it listed anywhere to buy?  anyone got any ideas where I can get one from?

thanks

K-jet is a pressure controlled system - get a pressure gauge on it and check what is really wrong before replacing parts based on other people's issues.

It looks like the check valve is no longer available separately, but you can still get new pumps that come with a new one.

It might just be that the valve has some grit in it.

Taking the pipes off the pump can be a hard job due to pipe corrosion and lead you to replacing other parts !

same as mk2 golf kjet ones assuming your pump is proper bosch. check the accumulator as well plus any other leaks in the system

Ok, thanks folk's. Will get someone to do a pressure test