Ordered from Khurasan about 5 times and never had any issues, his minis are superb. I have not bought any of his moderns mind (that said I have some of his Yom-Kippur Syrians which are great), but I have been informed numerous times that they are very good, if they are anything like the sci fi, then they are probably right.
I know of a number of companies that sell 15mm moderns in the U.K (QRF, Peter Pig, Fighting 15s) and I know in the U.S there is Flytrap, Rebel minis however I have honestly no experience buying from them, so I couldn't pass comment, though they all have good ranges from what I see when I go for a browse, and when I see other peoples work.