I've done two using spray tips from Agri-supply and braided hose from mcmaster carr. In both cases we already had the tank/handsprayer combo. As stated in the other posts, if you start from scratch it will be more expensive. Converting the 15 gallons sprayer isn't too expensive though. I added a Q-D coupling to make the hand wand removable on the second one.
Machine Builders Network
Catalog: Current Buyer's Guide from Agri Supply® - Where we have Something for Everyone for your Farm Shop & Home
Machine Builders Network
Catalog: Current Buyer's Guide from Agri Supply® - Where we have Something for Everyone for your Farm Shop & Home