Hi Leah,
The "superfast" AAA triplet is a giveaway that the player, and, (in this case), the composer Brenda Stubbert is a fiddle player, and so you will have to find alternative ornaments for this part of the tune.
I'm sorry but I've never heard of the expression "regular-fast" to describe two successive A notes in a tune, but there is absolutely no need to alternate or use different bellows directions for these two notes. This is where the grace-notes come in handy, and, in this particular tune, a grace-note would also be on the beat.
Here are some suggestions, but not exhaustive, to deal with those repeated A notes for the first part of this tune:
Simon,
Unfortunately, neither one-finger triplets, bellows reversals or bellows quivers will suffice for Irish Traditional Music, for obvious reasons.
Regards,
John.