As you have already found out, Rans and Easy Racer probably are the most popular and adjustable recumbents on the market for a tall person. Both companies offer Extra Large Frames. Another Company that I am familar with is Long Bikes out of Colorado, but it depends if you want over or under the seat steering. Linear if they are still in business used to make adjustable frames for tall riders as well. Unfortunately I cannot remember the name of the guy that was welding the titaium Easy Racer Ti Rush, but I do recall he had his own recumbent company as well. What you might do is write the editor at www.bentrideronline.com and ask him. I think his name is Brian.

Hope this helps!

Jason