Where to get good quality compost in Ireland?

Is the Westland Compost in a Woodies type store any use? Looking to get some John Innes no 3 (ideally with peat in it) but a lot of the options are peat free and have heard mixed reviews on the Westland brand anyway?

Not looking for a half tonne either, just a 20 - 50 litre type bag.

So, any recommendations on compost? (Creating own is not an option, currently).

Thanks