Wanted: 58cm Fast Road Frame 90s/00s

After winning a nice Serotta Atlanta on eBay and having the sale fall through, I am back in the market for a nice 90s/00s road bike frame.

It needs to be between 58-60cm square or thereabouts, either BB threading, without fork or threadless is preferable but will definitely consider threaded F&F too.

I'm after high grade steel or titanium. Budget around the £500 mark, less is obviously better but I'm looking for something special.

This is the first piece of a complete new bike I'm building so if you have modern groupsets/parts to go with frames please let me know.

Thanks!

Now sorted. Thanks to everyone who PM'd me and I'm sorry if there was anybody I didn't get back to.

I know it isn't steel/ti but got a mint 58cm (c-t) Principia Rex e ellipse?
Original isaac full CF forks/FRM headset (Bars/stem not available but new bonty X lite seatpost is)
Frame is absolutely unblemished, forks have a very minor scratch on one leg from where a cassette caught it in the boot of my car.
Goes like a rocket but I've just purchased a carbon frame and I'm on a one in out out basis at the moment otherwise I'd be keeping her.
Asking £250 collected N.Herts or £264 incl insured courier (Could potentially drive to high barnet tube for the fuel)
I've also got some 6700 bits, new front & rear mechs, new 11-28 cassette, slightly shortened chain(couple of miles on it) & a pair of used but very good brake calipers. All in grey.

Thanks to those who have PM'd me. Still searching...