Meprolights are fairly popular. I have seen the mepro's in HK packaging with multi color. Last I knew mepro's and trijicon are now the same manufacturer. I have a set of trijicons on another unit and hate them. The vials are much smaller than the mepro's. But, now that the manufacturers are the same the problem is likely moot. I don't know if there a model made, but friends of mine have Tru-Glo combined tritium and FO sights. They are nice for acquisition, but are a little bigger. Best bet is to look on internet. At one time CDNN Investments and Cal's Sporting Armory had the mepro's (ie Tru Dot).