judging from the photos i've seen, it looks like a 1 1/8" threadless... and i would say a 26.0 bar clamp size... but the 25.4 throws me off... i didn't think anyone made anything in that size anymore?

i think you will be hard pressed to find another stem that is a 1 1/8" steertube clamp and a 25.4 bar clamp... but if it's actually 26.0 then there are a lot out there. the 60mm is the actual length of the stem, so you'll want something longer obviously