You can pick up a tray and dome at almost any garden shop or box lumber store this time of year, if you only have a few clones take a large baggie and put it over the plant and rubberband the baggie edges around the top of your pot/cup,etc. Let some air in it a few times a day if you can. You can clone after 12-12 starts, it just takes forever and its a 60-40 50-50% survival rate in my experience.Double shot of superthrive seams like alot but I dont like the stuff so I dont use it.I follow alot of rustys advice and am very please with the results need 50 posts to show photos or I would be showing off right now.
Good luck with your project.