broken pin on rocker-arm need help

can i just buy http://www.summitracing.com/parts/CCA-1622-1/?rtype=10
and run one in place of old one?

Summit's photo is generic.....here is what they should actually look like..
http://www.cnc-motorsports.com/comp-cams-1622-16-ultra-pro-magnum-chrysler-shaft-rocker-arms.html/

I suppose you could try to substitute 1 of them if you could get the spacing correct so the roller is centered on the valve tip.

IMO, THIS WOULD BE A TEMPORARY FIX ONLY! If it's happened to one, how long before another and another and another.....you get my point.