For those of us who do not have access to sacramental confession, does an Act of Perfect Contrition suffice until we can get to confession?
According to the Council of Trent, perfect contrition when combined with an ardent desire / intention / vow to receive the Sacrament would restore the soul to a state of justification. Most Catholics forget about the intention to receive the Sacrament part.
As others have pointed out, it's very difficult to know when one has received the grace to make an act of perfect contrition, and this uncertainty should be used to inspire in us an even more ardent desire to receive the Sacrament of Confession.
IMO, many Eastern Rite priests and older Novus Ordo priests (those ordained before about 1967) can validly administer the Sacrament. You can even seek out on older Novus Ordo priest and invoke Benedict XVI's "motu" to request that they use the Traditional Rite.
Summorum states that the faithful's request to receive any of the Sacraments in the Traditional Rite must be respected and accommodated. You'll most likely have to bring a copy of the Old Rite for them though because they won't have access to it. If they are not comfortable with the Latin, just bring an English version and make sure they properly pronounce the words of absolution.