I (and many others) got disconnects from this guy on ebay.
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stores.ebay.com/The-Bruhaus-Brewing-And-...?_trksid=p4340.l2563">
stores.ebay.com/The-Bruhaus-Brew ... 4340.l2563
I paid just over 20 euro for 2 sets. Theyre in the US but I got mine in less than a week and that was coming up to christmas so theyre speedy enough.
Your best bet for the cylinder is probably munster co2 in cork or D&D in dublin if you're ever up this way (was in there today getting a refill, they've piles of them).
Might have to go on the web for the reg.
I have a spare, second hand, flow control tap - I'd let it go for 25 euro - the nut for tightening it onto wherever you're mounting it, is missing, but ya might pick one up in a hardware shop.
You're in limerick though, so you'd have to organise delivery. You might get an offer from someone more local or someone who has all the kit in one go.