Elderly Instruments has Fremont Blacklines for dGBE on a tenor, I just ordered some today.
Please report back on those. I think I asked about those 6 months(?) ago and nobody had tried them yet.
I had good results with the Southcoast HU-NW set on a tenor banjo uke. I'd probably try the LHU-NW set too.
...liked the relaxed feel of lower tension, didn't care for the sound, felt like I was asking my uke to do something it wasn't made for somehow...
I have not done this yet, but it seems that you could use a linear set of tenor strings with a wound low G and an extra E string. The low G is the third string, the C becomes the second string dropped to a B, the E string becomes the first and the fourth dropped down to a high d.
I play dGBE tenor exclusively. My strings are Aquila, because they were available. I just posted a video in the Links & Video section. Gretsch tenor with dGBE tuning. Check it out.
Be aware: You MUST use strings especially designed for this tuning. Otherwise, it won't work. Just tuning regular gcea strings up or down is useless.
Until I started using the low tuning, I could not stand the tenor uke. Now, I play it a lot, and I will never go back to C tuning. That's for sopranoes and concerts, as far as I'm concerned.