Replacement reservoir recommendations?

Looks like the fluid has eaten a bit of the cap on my stock reservoirs. Anyone know of some nice billet replacements? I see Casoli has some, and Rizoma (no thanks) and Hooligan Racing (brake only?) So I'm looking for some user feedback if anyone has those or any others.

if you're looking for JUST the caps (not the reservoirs), then you can also find 'em at tastynuts.com (pro-bolt), yoyodyneti.com and motowheels.
personally, i like the rizoma's. classy and small with windows to view level.
no reason the brake-ones from hooligan couldn't be used on the clutch side.