injector cup accident SOS please advice
 

I removed #6 injector and cup came with it, i cleaned cup put new orings and oiled rings, when i went to putting the cup into the head, i couldnt really see very well and began tapping cup into head, after about 6 or 7 pretty good taps i looked at cup and it didnt look like it went down very far it also looked crooked in the hole.
i pulled out the cup and looked at the inner mating surface of the head where the beveled edge of the cup would mate with the head, and it had a quarter moon cut in the mating surface of the head where the cup nozzle had been hitting it.
the injector cup is toast i can get another one, but im concerned that the mating surface on the head may need to be repaired, the cut is on the outer edge of the surface and it seems like i still have about3/4 of the diameter untouched
Any help or suggestion would be appreciated. Attachment 23192

id say your gonna have to get if fixed some how. either machine shop or buy a new head. you might could try and see what happens but that would worry me if it was my truck

yeah thats what im afraid of if i put back together and it doesnt work i have to tear it down again

i took a plumbers tool that you use to seat the washers to the facet and turned mine and glued the crap outta it and it has been working fine for over a year you have to use permaneant thread sealer on them hope this helps the corect way to do it is take your head to a machine shop and get it done with the right machine but if your straped like the rest of America it doesnt hurt to try first and see what it looks like good luck

So where do I go to get this tool and is it self explanatory when I see the tool
Thanks for the advice

yeah you can get them at the hardware store and its self explicite,ill try to get a pic on here for ya may be tommarrow before i get it done