I just bought the Ritter Mini grip (after receiving advice here) and will probably go back for the full size ritter Griptillian as well.
Yes, there are full sized plain edge in 154 cm - model 551 for the drop point and another with the sheeps foot - see the Benchmade site. They are about half the price of the Ritter versions. There is also a D2 version at a cost in between
Search here for a thread I started (but cannot find at the moment) "Which mini griptilian? - and it should answer a lot of questions about the differnces between the models. There was some excellent advice by knowledgable people who had both ritter, D2 and standard models (154cm now)- the weight to me of the advice is that all are good but the ritter was the marginal favourite.
I chose the ritter because the blade does has a higher grind, lacks the false edge on the back (I don't like tactical look) and the stone wash blade is very attractive and pragmatic (the D2 comes in black only)
The thing came scary sharp as the healing cut on the end of my thumb shows when I became a little complacent
There is a 551 finishing on ebay for around $55 in a couple of hours, but I'll probably go back for the ritter for over twice that.
There are even aftermaket mods to get to change the scales (at outrageous cost ) but look very good