This is a good read. According to this the stock GN stall is 2200. That's a bit too tame in my opinion...
http://www.gnttype.org/techarea/transmission/converters.html
Here's a Monster Transmission 2400-2800 stall lockup (27 spline)
http://www.monstertransmission.com/...ll-27-Spline-Lockup_p_11931.html#.V_50s42QK70
Not familiar with this brand. Summit advertises it as a 2800 stall. It has a good review from someone that appears to know what they are talking about. Worth looking at in my view....
https://www.summitracing.com/parts/ape-48432/overview/
You get the idea. Do some more looking. TCI offers a few 3000 stall converters. It would be good to get some feedback on how a few of these different brands feel with a 200-4R with a particular setup. My torque converter experience is with a lockup 4L70E in my daily so I don't have 200-4R experience.