OT: Looking for a fic

["btvslover2001" <btvslover@xxxxxxxxxxx>]

I know this isn't exactly the right place to look for this fic but 
I'm hoping with 1000+ people somebody might be able to help me

It a fic set a few years into the future and a crossover with 
Highlander I think.

Xander was working for a government agency could have been the army 
but not the Riley's mob, and they did counter stuff. In the story I 
think both Xander and Buffy and possible Willow were all immortal.

Anyway Xander's group come across a demon thing and he calls in Buffy 
Angel and Willow. Who have to help train the unit how to fight. In 
it I think Buffy and Angel are together, I think it's about post 
season 3.

In the story there is a big sword fight scene between Xander and 
Buffy and the final battle happens in a stadium of some sort. While 
Xanders unit are taking on the human 'help' Buffy and co are fighting 
a big demon.

Now much to go on, I know but I've my fingers crossed it rings a bell 
for somebody