Had a struggle with this myself,trying for originality.Couldn't find a tidy black Mega-Lite stem.They were apparently recalled due to cracking and replaced with the silver ones.Did a lot of searching here and elsewhere.There were a couple of sellers on ebay who sold a number of these in various lengths but I think they all went a year or so ago.I just managed to grab the last 130mm one (currently fitted).
I have an A-Tac stem in 1 1/4" but is sadly for 25.4 bars.Was going to go that route till I got sorted.Available if you get stuck.