Tasha, saw this thread and thought of you! No idea about double or triple buggies. What do you do at the moment? use a sling with the double buggy?
Was going to ask if you ever used your local freecycle to ask if anyone has a cot or double/triple buggy they no longer use? I do it all the time, I've had a sofa, my cot, a pushchair, babyswing, steriliser, clothes, babybath, changing unit, fireguard... amongst other things!
Have a look on freecycle.org to find your local group, I think your options are:
Co. Leitrim (Ireland, Ireland)
City of Cork (Ireland, Ireland)
Co Wicklow (Ireland, Ireland)
County Donegal (Ireland, Ireland)
Mayo (Ireland, Ireland)
County Carlow (Ireland, Ireland)
County Kerry (Kingdom) (Ireland, Ireland)
Galway (Ireland, Ireland)
Dublin (Ireland, Ireland)
Waterford (Ireland, Ireland)
Westmeath (Ireland, Ireland)
Sligo (Ireland, Ireland)
Tipperary (Ireland, Ireland)
Roscommon (Ireland, Ireland)
County Kildare (Ireland, Ireland)
Limerick (Ireland, Ireland)
Ennis (Ireland, Ireland)
County Wexford (Ireland, Ireland)
Cavan/Monaghan (Ireland, Ireland)
Are any of those close enough to be of any use?