There are? As in ones designed and built within the last decade?
Best I can find is there are two - a French one (they're not sharing) and a British one bases on a Danish design that is still under construction.
IIRC, the cost analysis of the LCS was based on an Aussie ship.
Depends on exactly what criteria you want to use to select, but yeah…just about every single NATO country that has a Navy has a frigate. It’s about the minimum bar to have a Navy that wants to be able contribute to a US led Coalition without needing hand holding the whole time.
Spain has an AEGIS frigate although I’m not sure I’d want to buy Navantia from prior experience, FREMM is still pretty current (but would be an admission of a fuck up in canceling FFG62), Brits have both the Damen derived design and their own Type 26, which our other FVEY allies are wrapping up their own versions of, among many others. And many of them integrate our weapons systems into their combat systems suite.
The French are sharing their new frigate AFAIK, at least they’re exporting to others. Maybe we pissed them off enough they don’t want to share, who knows.
In the end, most would require a combat systems overhaul to accommodate US C4I, radars and missiles, so none are going to be fully turn key ready, but some will be closer than others.
If we end up doing a FVEY AEGIS FFG with Australia/Canada I might lose my fucking mind.