2003 d12 volvo injector problems

Hello, I’ve been having problems with injectors for little over a year now started off with one replaced it. Then it went to another replaced that got me through till next year. Then another one went out so I replaced the rest and put all new injector cups in also. Now another code popped up injector # 6 electrical fault. I’m thinking the injector wiring harness needs replaced. I have the older type of injectors with the two studs on top so I know the splicing is out of question. Can I get the whole injector harness? And hopefully thats my problem? Thank You .