well, thats a little tricky since most agp cards are old or really slow.
BUT i did find a HD4670 and the funny thing is i also found this review on newegg:
An AGP ATI Card that works out of box
Reviewed By: Hardin9745 on 6/8/2010
Pros: I purchased the identical (or nearly so) HIS AGP 4670 from newegg recently. Approx a 20 % improvement over my retired Nvidia 7800GS (BFG oc edition) which was also a Great great card.http://www.newegg.com/Product/Product.aspx?Item=N82E16814161337