I agree with those SOTWers WHO ACTUALLY ANSWERED YOUR QUESTION (as opposed to lecturing/preaching at you on the need to practice long tones like Kenny Garrett :| ) by
suggesting a Claude Lakey--I have a 6+3 for my tenor and that baby will cut through walls, let alone big horn sections. The sound quality is, however, pretty iffy, especially in the upper register, and certainly in comparison with a nice playing Link. If you're like me (and not Egilf

), you won't enjoy practicing long tones (or anything else) on it because the sound is so "big" (more like "obnoxous IMHO

! )
This might sound a bit crazy, but to get an instantly "bigger" sound, you could try the "old trick" of using a tenor reed on your Link--this is what I do with my SA80 Alto + HR link set-up when I'm battling stage volume (my Rovner lig accomodates the tenor reed no problems).
Rory
ps. there are some existing threads on the "tenor reed on alto MP thing" in which a number of real players weigh in on this one.
ps.