Why not make a thread in which people post math problems for others to solve?
You're an old pro at writing threads, Zero! It would be a piece of cake for you.
And Lynx, sorry I didn't answer... As far as a cloak goes... I'd need to find a pattern first and take a look at it. Unfortunately, I'm not all that skilled--just basic things, really, and I'd get nervous about making something for someone from such a distance (meaning I couldn't do any fittings, though a loose-fitting cloak might be feasible.)
If you sent me some pics, I'd have to see if there are some patterns in existence that would be close to what you're looking for. I know some people who are so talented they don't even need patterns, and can pretty much improvise anything, but unfortunately, I'm not one of them.