Inletted for what?
I used Mile High to inlet for DBM, they can do the flush cups too I am guessing.
Have only used LRI for a rifle, wouldnt hesitate to use them as well. High class, fast, very reasonable prices.
The flush cups are easy DIY. If your near Denver, I have the proper tap and have done a few. Its a 1 beer job..... and then the 2 post job to shoot the breeze about whatever.