I have 3 of the USPc 40 LEM variants. I swapped one barrel with the .357 sig barrel and I gave the other one to my wife.
The LEM is currently only available in the USPc 40SW. The ones that are floating in dealer hands right now are excess of a USDOJ-INS contract. They originally ordered 4000 units but purchased only 3000. The remaining 1000 units were released to LE Distributors. I purchased my two last year in October and December. A third one was purchased in February of this year.
Two places you might want to try is
www.lesales.com and
www.calssportingarmory.comI got mine for $649 with factory night sights and 3 10-rd mags.
The trigger pull is the slickest of the DAO pistols I've tried. You can change the weight from 8 lbs to 4.5 lbs with just a spring change. The reset distance is very short ( shorter than that of a glock) My wife sold her Glock 23 soon after she tried my USP40c-LEM.
HK has no current plans to manufacture any other LEM Variant for this year. However, there is talk of a full-sized USP w/ LEM trigger for next year. Also there have been rumors of LEM kits for current USP models. But that's just speculation at this point.