Grado MC+ or ME+ could be a good place to start. A search reports that the Dual 1229Q tonearm is low mass (designed for 70's quadraphonic cartridges) and the medium-high compliance Grados should be a good match. The Grados are meant for a common 47K moving magnet phone stage. Price $180-$260.
Mono cartridge recommendations for Dual 1229Q
I'm planning to make my Dual 1229Q dedicated for mono playback. What are some recommended contemporary mono cartridges that will work well with this TT's arm? (Note: I'm good with going somewhat budget on this, so long as I can get 80-90% of the performance of the pricier mono carts.)