OK, so, I found the Aquila strings for the standard tuning online. Thanks!
Any suggestions on how/where to find, or cobble together, a set of strings for a mandola/tenor guitar tuning?
Here is what I have tested and found working so far, I have to dig up my notes for GDAE and will share that in another post.
CGDA 5ths tuning
-for 19" scale, using strings 5-4-3-1 from string set (if using classical strings)
Makala MK-B Baritone ukulele 19" scale
C-'A' string 0.035" classical lightly-polished wound from D'Addario EJ44LP set
G-'D' string 0.029" classical lightly-polished wound from D'Addario EJ44LP set
D-'E' string from Aquila LAVA Baritone GCEA set detuned
A-'A' string from Aquila LAVA Baritone GCEA set normal
-for 18" scale, using strings 5-3-2-1 from string set (if using classical strings)
Zither-Heaven Tenor banjolele 18" scale
C-'E' string GHS Vanguard Classics nickel smoothwound 5th string 0.033"
G-'G' string GHS Vanguard Classics nickel smoothwound 3rd string 0.020"
D-'B' string Thomastik-Infeld CN31 0.031"
A-'E' string Thomastik-Infeld CN27 0.027"
- for 17" scale, using strings 5-4-2-1 from string set (if using classical strings)
Walnut Tenor Flea ukulele 17" scale
C-'A' string 0.035" classical lightly-polished wound from D'Addario EJ44LP set
G-'D' string 0.029" classical lightly-polished wound from D'Addario EJ44LP set
D-'B' string Thomastik-Infeld CN31 0.031"
A-'E' string Thomastik-Infeld CN27 0.027"
I have ALSO used the Thomastik-Infeld CF-35 and CF-30 strings in all of the above configurations for the C and G strings and found them to work equally well if not much smoother than the D'Addario strings with less finger squeak noise.
Aquila makes a set called 31U that is CGDA tuning for 'concert ukes' but works well on tenor scale also, and the string gauges for the wound strings on those sets are ALSO 0.035" for the C string and 0.030" for the G string as per using my digital calipers to measure them. I have them installed on my Mainland longneck concert pineapple (17" tenor scale)...
GDAE is tricky to get on anything smaller than 22" scale since the G2 string needs to be about 0.058" in order to have about 12lbs of tension and INTONATE well, all smaller diameter strings and on shorter scales have had intonation problems of being about 20 cents sharp and being VERY floppy tuned to G2, which is a very low pitch for 17" or 19" scales, and also likely a frequency below the body resonance of such instruments, meaning it will sound choked off, soft and muted compared to the notes on the other strings.
The above results come from working out strings for 5ths tunings on various scale lengths using either existing ukulele strings or existing classical guitar strings, either as singles or sets, over at least the past full year. I am sure there are other options that I have not tried yet, but the above is a sample of what I have found to work well so far.
Hope this helps.