Does not exists yet that I know of, but it is reported to be under construction at:
http://astgn2k3.simodified.com/I read somewhere that somebody thought Orlando Speedworld would be a good stand in for the track, but from the pictures I have seen of Seekonk, it seems to me like Orlando is much more banked.
I was thinking maybe Beech Ridge might be a good stand in but it might be too flat.
Some NR2003 tracks that are 1/3rd mile you could check out to see if it fit your needs:
- Bridge City
- Canaan
- Catamount (I have used this track for online points race, had no issues)
- Dells
- Flamboro
- Golden Sands
- Hialeah
- Huntsville (I have used this track for online points race, no issues)
- Laird
- New Brunswick (NBIS)
- New Asheville
- Peterborough
- Richmond Raceway (not THE Richmond, this one is an awesome 1/3rd mile track)
- Riverside (use the latest Riverside_NH, it ROCKS!!!)
- Speedway 95
- Spud
- Sunset
- Unity
- Wiscasset
If any of those interest you and you can't find them through the normal sources let me know, I will provide you with all the links I can find in the readme files that came with the track to help you locate the creator or place authorized to host them.
I have created my own personal database of NR2003 tracks and those listed are reported in their track.ini files as being between .330 and .333, if you would be interested in a list of tracks between .300 and .399 the list grows to 77 tracks that I have recorded, surely there are more.
Let me know if you want a longer list of tracks to try.