Inlet manifold gasket set

Thanks to previously gaining info from this web site, I've been busy doing the relatively easy things (e.g. new temp sensor, new oxygen sensor) to try to stop the old girl stalling at low revs. She's still doing it. So now it appears I need to replace the inlet manifold gasket(s).

Can anyone recommend where I can buy a set of gaskets, O-rings and whatever other bits I need? I've had a look online, but haven't yet seen anything for my 2001 Fabia 1.4 petrol.

Any advice gratefully recevied! Thank you.