Steve Dunn and Kirk Rexroat both forge and make tac folders, but save up your pennies, they both get well past $400 usually ($500 to $600 is what I recall from hazy memory), and both typically use 52100 but I'll bet they'd do W2 or L6. I like Kirk's "Large Folder" as a hunting knife, but the price is steep. Harvey Dean might make something that is nearly tactical now too (hazy memory of something).
http://rexroatknives.com/
http://www.stevedunnknives.com/
http://members.tripod.com/~hdean/index.htm#LINKS
Also, Darrel Ralph forges 52100 (and his own damascus of course). I know Darrel is at least a Journeyman Smith (think he made Mastersmith), and he'd probably do an Apogee or EDC for you outta that, and might do W2 or L6, but not sure.
For sure, Rick Dunkerly forges 52100 and makes high end designer-damascus folders, but I suppose you might be able to talk him into making something dressed-down, tactical. Expect to pay more than $400 again.
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With that said, I've got to say that forging for a small blade isn't going to necessarily buy you much in my own personal opinion, not on a small blade (say 4" or less). A well heat treated stock removal carbon steel blade should be fine for a folder. Even if you wanted something differentially heat treated (which seems like overkill to me especially since the blade pivot in a folder is a big limiting factor), a maker could try to pull that off on a folder even from stock removal.
Consider having 3V treated to Rc60 by someone who knows how to deal with the stuff.
3V at Rc60 is be twice as tough as A2 at Rc60, and will hold an edge with D2 at Rc60. A2 is twice as tough as D2, so 3V is plenty tough for a folder.
Bailey Bradshaw is using a lot of 3V for his folders (haven't seen anything particularly tactical from him though).
Also, you might be well served to talk to a couple dealers, as they sure see a whole spectrum of stuff at shows and will know who is doing what you are after. I can recommend these:
Les Robertson
http://www.robertsoncustomcutlery.com/
Larry at KnifeArt
http://www.knifeart.com/customknives.html
Arizona Custom Knives (Karen & Jay Sadow)
http://www.arizonacustomknives.com/custommakerlist.htm
Nordic Knives (Dave Harvey)
http://www.nordicknives.com/front.html
(they have a 3.125" Kirk Rexroat folder w/ stag & 52100 for $650)