If you don't find one by the time I get back from my deployment in a few months I will reach out and sell you mine. It is the best rail I have ever used on the MCX series, but I bought a TacOps which is filling that niche now so it is just sitting in the closet since I swapped back to the short rail.
Only thing I would caution you with this rail is that with the SRD suppressors you are unable to use the side MLOK slots above the suppressor because the nuts will push against the suppressor. You have to use the slots above the barrel or use the Picatinny rail on top of the rifle. This might not be the case for all MLOK accessories but it was for mine. This does not apply to the bottom MLOK slots the entire length of the handguard.