There are companies that will do off-car cleaning of fuel injectors for $25/each. Finding one that
is local to you might be a different problem unless you want to send them off...
Linder Technical Services
http://www.lindertech.com will sell you cleaned/balanced injectors for $25/each, and I think they give you $3 back as a core charge (not sure). I think they even come with a printout verifying the flow rate. I'd suggest giving them a call....
Brian