A lot of people recommend Cruzin Performance for injector rebuild and I've sent them injectors as well. There is, what I believe, a much better option for about $25 each.
Motor Man Fuel Injector Supply
989-644-2695
Motor Man Fuel injector Websites sell a full line of Automotive Fuel Injectors @ wholesale prices & no core charges or core returns due back.
They did a MUCH better job for my Spider and as a result have earned my business exclusinvely.