There is a listing for a AT50ANV Moving Coil cart in LP Gear website. The specs are very close to the ART 7 cart. Interesting! Some A'goners might have used this one as well.
https://www.lpgear.com/product/AT50ANV.html
The vendor also sells through Amazon. Currently listed in Amazon as well.
https://www.lpgear.com/product/AT50ANV.html
The vendor also sells through Amazon. Currently listed in Amazon as well.