Shane - defintely keep the fluid intake up in conjuction with the fibre intake. I usually have around 2-3 litres a day (mostly water and generally more in the summer). I have vastly reduced the carb aspect of my diet to a very little- perhaps 1-2 tablespoons at most each day and absolutely no bread and this stopped the bloating. I have increased the vegetable side of things and I have nowhere the issues I used to have. (I absolutely can not tolerate fat and find that this causes me alot of stomach/digestive problems).
I too got prescribed SR met whilst I was living in RoI and when I went to fill it at the chemist, they also advised it was not licensed, but then when on to say they could still order it from the UK if I didn't mind waiting a couple of days. Having said that my drugs bill for that month went from 6Euro to 24Euro, so it is not a cheap drug - probably why it is not licensed over there!. Eventually I went back onto standard Met, and combined with a controlled food intake everything settled down and I mostly had no issues with food/drugs/stomach cycle.
On my return to the UK,the doctor here has kept the same level of met (2000mg), but proscribed it as 4x500mg tablets, rather 2x1000mg. I have not any issues at all. Perhaps you could suggest your doctor/clinic to try the medication as 500mg doses, rather than 1000mg dose. It might make a difference if you are having problems and Irish pharmacies can issue 500mg doses without issues.
Don't ask me why the same dosage delivered as 2 tablets rather than one would make a difference - all I know is I don't have the same issues I had sometimes had when taking it as a single tablet. Diabetes is a disease that is so so different for each person. It has to be treated uniquely and one size really does not fit all.