How do you measure length? There are a few ways, all called "standard" by somebody at least, and which can vary by up to a centimeter (1 size!!). I have a few 26.0 in that range, but I'd hate to send you what I think is a 100 and you think is a 90, or vice versa on the top end.

If you're looking for 31.8 quill, I think you have just added a potentially fatal constraint to your search. The arrangement you bought is what you'll have to settle for.

Also, I've found a 2 to 3 cm step change in stem extension to be big. I like to do my own fit adjustments in one-size increments. I've found changes from say 10 to 8 to be too big a jump.

I do have a 120 Pearl 22.0/26.9, and some really light sheet metal thing in similar sizing, and I think a Modolo in 110 mm extension and 22.0/26.0. PM me if you want to know more.