Potter Robes... what to do? HELP!

Okay, so I'm trying to select an option on robes for Lumos. I have a fandom friend who makes robes, and she'll make me a Quidditch robe, but not necessarily for Gryffindor. I'm sure the quality is great, but it'll be $100. On the other hand, there's always the option of buying a pre-fabricated robe. It's a cop-out, I know. Especially considering I like to hand-make everything. However, some of the prices seem reasonable. Take a look at what I've found, and tell me what you think.

ALSO... I'm 5'1", and not fat. Do you think I'd fit a child's large size robe? Because this Quidditch robe looks decent:
http://www.costumecraze.com/HP71.html
But they don't seem to have an Adult's Quidditch robe. In contrast, one of the selections indicated that a child's size XL and will fit someone up to 5'9.

And of course, then there are the school robes, and the good one is... survey says... SOLD OUT:
http://www.costumecraze.com/HP81.html
BLARGH!!!!

Then there are the ones from this site:
http://www.halloweencostumes4u.com/1-harry-potter.html
I'll admit I like the concept of the Triwizard Cup Third Task costume... but I'm sure it's a piece of junk, and probably won't fit right. But more specifically, check out the robes.

So, opinions? I beg of thee!

Oh, and if anyone knows how to sew really well, and would like to help me in my hunt for the perfect costume... I can include one of my hand-carved wands in the payment. Ask anyone who's seen them - they're great. I'll actually post pictures of the wands soon... you can order them!
*CoughShamelessPlugCough*

~M