That's my airline, its the LOC DME 15. We aren't authorized RNP approaches.
As far as the poster advocating RNP as a method of increasing an airports level of operations, I don't think the argument works in ASE. Another runway would help, not that there's room or the political will for that. The opposite direction traffic is the limiting factor during busy days as arrivals and departures all come from/depart to the north.